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The Doors of Perception

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The Doors of Perception

The Doors of Perception
1st edition (UK)
Author Aldous Huxley
Country United Kingdom
Language English
Subject Philosophy
Genre Non-fiction
Publisher Chatto & Windus (UK)
Harper & Row (US)
Publication date
Media type Print (hardback & paperback)
Pages 63 (hardcover, first edition; without the accompanying essay 'Heaven & Hell', written in 1956)
OCLC 54372147
615/.7883 22
LC Class RM666.P48 H9 2004

The Doors of Perception is a short book by Aldous Huxley, first published in 1954, detailing his experiences when taking mescaline. The book takes the form of Huxley's recollection of a mescaline trip that took place over the course of an afternoon, and takes its title from a phrase in William Blake's 1793 poem The Marriage of Heaven and Hell. Huxley recalls the insights he experienced, which range from the "purely aesthetic" to "sacramental vision".[1] He also incorporates later reflections on the experience and its meaning for art and religion.


Mescaline (Peyote and San Pedro Cactus)

Mescaline is the principal agent of the psychedelic cactus peyote and San Pedro cactus, which has been used in Native American religious ceremonies for thousands of years.[2] A German pharmacologist, Arthur Heffter, isolated the alkaloids in the peyote cactus in 1891. These included mescaline, which he showed through a combination of animal and self-experiments was the compound responsible for the psychoactive properties of the plant. In 1919, Ernst Späth, another German chemist, synthesised the drug.[3] Although personal accounts of taking the cactus had been written by psychologists such as Weir Mitchell in the US and Havelock Ellis in the UK during the 1890s, the German-American Heinrich Kluver was the first to systematically study its psychological effects in a small book called Mescal and Mechanisms of Hallucinations published in 1928. The book stated that the drug could be used to research the unconscious mind.

Peyote as entheogen drug

In the 1930s, an American anthropologist Weston La Barre, published The Peyote Cult, the first study of the ritual use of peyote as an entheogen drug amongst the Huichol people of western Mexico. La Barre noted that the Indian users of the cactus took it to obtain visions for prophecy, healing and inner strength.[4] Most psychiatric research projects into the drug in the 1930s and early 1940s tended to look at the role of the drug in mimicking psychosis.[5] In 1947 however, the US Navy undertook Project Chatter, which examined the potential for the drug as a truth revealing agent. In the early 1950s, when Huxley wrote his book, mescaline was still regarded as a research chemical rather than a drug and was listed in the Parke-Davis catalogue with no controls.[6]

Close up of a peyote cactus growing in the wild.
A peyote cactus, from which mescaline is derived.

Huxley had been interested in spiritual matters and had used alternative therapies for some time. In 1936 he told TS Eliot that he was starting to meditate,[7] and he used other therapies too; the Alexander Technique and the Bates Method of seeing had particular importance in guiding him through personal crises.[8] In the late Thirties he had become interested in the spiritual teaching of Vedanta and in 1945 he published The Perennial Philosophy, which set out a philosophy that he believed was found amongst mystics of all religions. He had known for some time of visionary experience achieved by taking drugs in certain non-Christian religions.

Research by Humphry Osmond

Huxley had first heard of peyote use in ceremonies of the [12]

Huxley's experience with Mescaline

After reading Osmond's paper, Huxley sent him a letter on 10 April 1952, expressing interest in the research and putting himself forward as an experimental subject. His letter explained his motivations as being rooted in an idea that the brain is a reducing valve that restricts consciousness and hoping mescaline might help access a greater degree of awareness, (an idea he later included in the book).[13] Reflecting on his stated motivations, Woodcock wrote that Huxley had realised that the ways to enlightenment were many, including prayer and meditation. He hoped drugs might also break down the barriers of the ego, and both draw him closer to spiritual enlightenment and satisfy his quest as a seeker of knowledge.[14]

In a second letter on 19 April, Huxley invited Osmond to stay while he was visiting Los Angeles to attend the American Psychiatric Association convention.[15] He also wrote that he looked forward to the mescaline experience and reassured Osmond that his doctor did not object to his taking it.[13] Huxley had invited his friend, the writer Gerald Heard, to participate in the experiment; although Heard was too busy this time, he did join him for a session in November of that year.[16]

Day of the experiment

Osmond arrived at Huxley's house in West Hollywood on May 3rd 1953, and recorded his impressions of the famous author as a tolerant and kind man, although he had expected otherwise. The psychiatrist had misgivings about giving the drug to Huxley, and wrote that "I did not relish the possibility, however remote, of being the man who drove Aldous Huxley mad," but instead found him an ideal subject. Huxley was “shrewd, matter-of-fact and to the point" and his wife Maria "eminently sensible".[17] Overall, they all liked each other, which was very important when administering the drug. The mescaline was slow to take effect, but Osmond saw that after two and a half hours the drug was working and after three hours Huxley was responding well.[18] The experience lasted eight hours and both Osmond and Maria remained with him throughout.[19]

The experience started in Huxley's study before the party made a seven block trip to The Owl Drug (Rexall) store, known as World's Biggest Drugstore, at the corner of Beverly and La Cienega Boulevards. Huxley was particularly fond of the shop and the large variety of products available there, (in stark contrast to the much smaller selection in English chemist's shops). There he considered a variety of paintings in art books. For one of his friends, Huxley's poor eyesight manifested in both a great desire to see and a strong interest in painting, which influenced the strong visual and artistic nature of his experience.[20]

After returning home to listen to music, eat, and walk in the garden, a friend drove the threesome to the hills overlooking the city. Photographs show Huxley standing, alternately arms on hips and outstretched with a grin on his face. Finally, they returned home and to ordinary consciousness.[21] One of Huxley’s friends who met him on the day said that despite writing about wearing flannel trousers, he was actually wearing blue jeans. Huxley admitted to having changed the fabric as Maria thought he should be better dressed for his readers.[22] Osmond later said he had a photo of the day that showed Huxley wearing flannels.[23]

Compilation of the book

One of the copies of William Blake's unique hand painted editions, created for the original printing of the poem. The line from which Huxley draws the title is in the second to last paragraph. This image represents Copy H, Plate 14 of The Marriage of Heaven and Hell which is currently held at The Fitzwilliam Museum.[24]

After Osmond's departure, Huxley and Maria left to go on a three-week, 5,000-mile car trip around the national parks of the North West of the USA. After returning to Los Angeles, he took a month to write the book.[25] The Doors of Perception was the first book Huxley dedicated to his wife Maria.[26] Harold Raymond, at his publisher Chatto and Windus, said of the manuscript, "You are the most articulate guinea pig that any scientist could hope to engage.”[23] The title was taken from William Blake's poem The Marriage of Heaven and Hell:

If the doors of perception were cleansed every thing would appear to man as it is, infinite. For man has closed himself up, till he sees all things through narrow chinks of his cavern.[27]

Huxley had used Blake's metaphor in The Doors of Perception while discussing the paintings of Vermeer and the Nain brothers, and previously in The Perennial Philosophy, once in relation to the use of mortification as a means to remove persistent spiritual myopia and secondly to refer to the absence of separation in spiritual vision.[28] In the early 1950s, Huxley had suffered a debilitating attack of the eye condition iritis. This increased his concern for his already poor eyesight and much of his work in the early part of the decade had featured metaphors of vision and sight.[29]


After a brief overview of research into mescaline, Huxley recounts that he was given 4/10 of a gram at 11:00 am one day in May 1953. Huxley writes that he hoped to gain insight into extraordinary states of mind and expected to see brightly coloured visionary landscapes. When he only sees lights and shapes, he puts this down to being a bad visualiser; however, he experiences a great change in his perception of the external world.[30]

By 12:30 pm, a vase of flowers becomes the "miracle, moment by moment, of naked existence". The experience, he asserts, is neither agreeable nor disagreeable, but simply "is". He likens it to Meister Eckhart's "istigheit" or "is-ness", and Plato's "Being" but not separated from "Becoming". He feels he understands the Hindu concept of Satchitananda, as well as the Zen koan that "the dharma body of the Buddha is in the hedge" and Buddhist suchness. In this state, Huxley explains he didn't have an "I", but instead a "not-I". Meaning and existence, pattern and colour become more significant than spatial relationships and time. Duration is replaced by a perpetual present.[31]

Reflecting on the experience afterwards, Huxley finds himself in agreement with philosopher C. D. Broad that to enable us to live, the brain and nervous system eliminate unessential information from the totality of the Mind at Large.[32]

Vermeer's The Milkmaid.
The Milkmaid by Johannes Vermeer. "That mysterious artist was truly gifted with the vision that perceives the Dharma-Body as the hedge at the bottom of the garden", reflected Huxley.

In summary, Huxley writes that the ability to think straight is not reduced while under the influence of mescaline, visual impressions are intensified, and the human experimenter will see no reason for action because the experience is so fascinating.[33]

Temporarily leaving the chronological flow, he mentions that four or five hours into the experience he was taken to the World's Biggest Drug Store (WBDS), where he was presented with books on art. In one book, the dress in Botticelli's Judith provokes a reflection on drapery as a major artistic theme as it allows painters to include the abstract in representational art, to create mood, and also to represent the mystery of pure being.[34] Huxley feels that human affairs are somewhat irrelevant whilst on mescaline and attempts to shed light on this by reflecting on paintings featuring people.[35] Cézanne's Self-portrait with a straw hat seems incredibly pretentious, while Vermeer's human still lifes (also, the Le Nain brothers and Vuillard) are the nearest to reflecting this not-self state.[36]

For Huxley, the reconciliation of these cleansed perceptions with humanity reflects the age old debate between active and contemplative life, known as the way of Martha and the way of Mary. As Huxley believes that contemplation should also include action and charity, he concludes that the experience represents contemplation at its height, but not its fullness. Correct behaviour and alertness are needed. Nonetheless, Huxley maintains that even quietistic contemplation has an ethical value, because it is concerned with negative virtues and acts to channel the transcendent into the world.[37]

Red Hot Poker or Kniphofia flowers.
The Red Hot Poker flowers in Huxley's garden were "so passionately alive that they seemed to be standing on the very brink of utterance".

After listening to Mozart's C-Minor Piano Concerto, Gesualdo's madrigals and Alban Berg's Lyric Suite,[38] Huxley heads into the garden. Outside, the garden chairs take on such an immense intensity that he fears being overwhelmed; this gives him an insight into madness. He reflects that spiritual literature, including the works of Jakob Böhme, William Law and the Tibetan Book of the Dead, talk of these pains and terrors. Huxley speculates that schizophrenia is the inability to escape from this reality into the world of common sense and thus help would be essential.[39]

After lunch and the drive to the WBDS he returns home and to his ordinary state of mind. His final insight is taken from Buddhist scripture: that within sameness there is difference, although that difference is not different from sameness.[40]

The book finishes with Huxley's final reflections on the meaning of his experience. Firstly, the urge to transcend one's self is universal through times and cultures (and was characterised by H. G. Wells as The Door in the Wall).[41] He reasons that better, healthier "doors" are needed than alcohol and tobacco. Mescaline has the advantage of not provoking violence in takers, but its effects last an inconveniently long time and some users can have negative reactions. Ideally, self-transcendence would be found in religion, but Huxley feels that it is unlikely that this will ever happen. Christianity and mescaline seem well-suited for each other; the Native American Church for instance uses the drug as a sacrament, where its use combines religious feeling with decorum.[42]

Huxley concludes that mescaline is not enlightenment or the Beatific vision, but a "gratuitous grace" (a term taken from Thomas Aquinas' Summa Theologica).[43] It is not necessary but helpful, especially so for the intellectual, who can become the victim of words and symbols. Although systematic reasoning is important, direct perception has intrinsic value too. Finally, Huxley maintains that the person who has this experience will be transformed for the better.


The book met with a variety of responses, both positive and negative,[15] from writers in the field of literature, psychiatry, philosophy and religion. These included a symposium published in The Saturday Review magazine with the unlikely title of, Mescalin – An Answer to Cigarettes, including contributions from Huxley; J.S. Slotkin, a professor of Anthropology; and a physician, Dr. W.C. Cutting.[44]

Literature: For the Scottish poet, Edwin Muir “Mr. Huxley's experiment is extraordinary, and is beautifully described”.[45] Thomas Mann, the author and friend of Huxley, believed the book demonstrated Huxley's escapism. He thought that while escapism found in mysticism might be honourable, drugs were not. Huxley's 'aesthetic self-indulgence' and indifference to humanity would lead to suffering or stupidity, and he concluded the book was irresponsible, if not quite immoral, to encourage young people to try the drug.[46]

For Huxley's biographer and friend, the author Sybille Bedford, the book combined sincerity with simplicity, passion with detachment.[47] "It reflects the heart and mind open to meet the given, ready, even longing, to accept the wonderful. The Doors is a quiet book. It is also one that postulates a goodwill – the choice once more of the nobler hypothesis. It turned out, for certain temperaments, a seductive book.”[48] For biographer David King Dunaway, The Doors of Perception, along with The Art of Seeing, can be seen as the closest Huxley ever came to autobiographical writing.[49]

Psychiatric responses included those of William Sargant, the controversial British psychiatrist, who reviewed the book for The British Medical Journal and particularly focused on Huxley's reflections on schizophrenia. He wrote that the book brought to life the mental suffering of schizophrenics, which should make psychiatrists uneasy about their failure to relieve this. Also, he hoped that the book would encourage the investigation of the physiological, rather than psychological, aspects of psychiatry.[50] Other medical researchers questioned the validity of Huxley's account. The book contained "99 percent Aldous Huxley and only one half gram mescaline" according to Ronald Fisher.[51] Joost A.M. Meerloo found Huxley's reactions "not necessarily the same as... other people's experiences."[52]

For Steven J. Novak, The Doors Of Perception (and Heaven and Hell) redefined taking mescaline (and LSD, although Huxley had not taken it until after he had written both books) as a mystical experience with possible psychotherapeutic benefits, where physicians had previously thought of the drug in terms of mimicking a psychotic episode, known as psychotomimetic.[53] The popularity of the book also affected research into these drugs, because researchers needed a random sample of subjects with no preconceptions about the drug to conduct experiments, and these became very difficult to find.[54]

In the field of religion, Huxley’s friend and spiritual mentor, the Vedantic monk Swami Prabhavananda, thought that mescaline was an illegitimate path to enlightenment, a "deadly heresy" as Christopher Isherwood put it.[23] Martin Buber, the Jewish religious philosopher, attacked Huxley's notion that mescaline allowed a person to participate in "common being", and held that the drug ushered users "merely into a strictly private sphere". Philosophically, Buber believed the drug experiences to be holidays "from the person participating in the community of logos and cosmos—holidays from the very uncomfortable reminder to verify oneself as such a person." For Buber man must master, withstand and alter his situation, or even leave it, "but the fugitive flight out of the claim of the situation into situationlessness is no legitimate affair of man."[55]

Robert Charles Zaehner

It was probably the criticisms of The Doors of Perception put forward by Robert Charles Zaehner, a professor at Oxford University, that formed the fullest and earliest critiques from a religious and philosophical perspective. In 1954, Zaehner published an article called The Menace of Mescaline, in which he asserted that "artificial interference with consciousness" could have nothing to do with the Christian "Beatific Vision".[56] Zaehner expanded on these criticisms in his book Mysticism Sacred and Profane (1957), which also acts as a theistic riposte to what he sees as the monism of Huxley's The Perennial Philosophy. Although he acknowledged the importance of The Doors of Perception as a challenge to people interested in religious experience,[57] he pointed out what he saw as inconsistencies and self-contradictions.[58] Zaehner concludes that Huxley's apprehensions under mescaline are affected by his deep familiarity with Vedanta and Mahayana Buddhism. So the experience may not be the same for others who take the drug and do not have this background, although they will undoubtedly experience a transformation of sensation.[59] Zaehner himself was a convert to Catholicism.

That the longing to transcend oneself is "one of the principal appetites of the soul"[60] is questioned by Zaehner. There are still people who do not feel this desire to escape themselves,[61] and religion itself need not mean escaping from the ego.[62] Zaehner criticises what he sees as Huxley's apparent call for all religious people to use drugs (including alcohol) as part of their practices.[63] Quoting St Paul's proscriptions against drunkenness in church, in 1 Corinthians xi, Zaehner makes the point that artificial ecstatic states and spiritual union with God are not the same.[58]

Holding that there are similarities between the experience on mescaline, the mania in a manic-depressive psychosis and the visions of God of a mystical saint suggests, for Zaehner, that the saint's visions must be the same as those of a lunatic.[64] The personality is dissipated into the world, for Huxley on mescaline and people in a manic state, which is similar to the experience of nature mystics.[65] However, this experience is different from the theistic mystic who is absorbed into a God, who is quite different from the objective world. The appendices to Mysticism Sacred and Profane include three accounts of mescaline experiences, including those of Zaehner himself. He writes that he was transported into a world of farcical meaninglessness and notes that the experience was interesting and funny, but not religious.

Photograph of Aldous Huxley.
Huxley later wrote that the "things which had entirely filled my attention on that first occasion [chronicled in The Doors of Perception], I now perceived to be temptations – temptations to escape from the central reality into a false, or at least imperfect and partial Nirvanas of beauty and mere knowledge."

Huston Smith

Soon after the publication of his book, Huxley wrote to Harold Raymond at Chatto and Windus that he thought it strange that when Hilaire Belloc and G. K. Chesterton wrote the praises of alcohol they were still considered good Christians, while anyone who suggested other routes to self-transcendence was accused of being a drug addict and perverter of mankind.[66] Later Huxley responded to Zaehner in an article published in 1961: "For most of those to whom the experiences have been vouchsafed, their value is self-evident. By Dr. Zaehner, the author of Mysticism, Sacred and Profane, their deliberate induction is regarded as immoral. To which his colleague, Professor Price, retorts in effect, 'Speak for yourself!'".[67]

Professor of religion and philosophy [68]

As the descriptions of naturally occurring and drug-stimulated mystical experiences cannot be distinguished phenomenologically, Huston Smith regards Zaehner's position in Mysticism Sacred and Profane, as a product of the conflict between science and religion – that religion tends to ignore the findings of science. Nonetheless, although these drugs may produce a religious experience, they need not produce a religious life, unless set within a context of faith and discipline. Finally, he concludes that psychedelic drugs should not be forgotten in relation to religion because the phenomenon of religious awe, or the encounter with the holy, is declining and religion cannot survive long in its absence.[68]

Later experience

Huxley continued to take these substances several times a year until his death,[69] but with a serious and temperate frame of mind.[70] He refused to talk about the substances outside scientific meetings,[71] turned down an invitation to talk about them on TV[72] and refused the leadership of a foundation devoted to the study of psychedelics, explaining that they were only one of his diverse number of interests.[73] For Philip Thody, a professor of French literature, Huxley's revelations made him conscious of the objections that had been put forward to his theory of mysticism set out in Eyeless in Gaza and Grey Eminence, and consequently Island reveals a more humane philosophy.[74] However, this change in perspective may lie elsewhere. In October 1955, Huxley had an experience while on LSD that he considered more profound than those detailed in The Doors of Perception. Huxley was overwhelmed to the point where he decided his previous experiments, the ones detailed in Doors and Heaven and Hell, had been nothing but entertaining sideshows.[75] He wrote in a letter to Humphry Osmond, that he experienced "the direct, total awareness, from the inside, so to say, of Love as the primary and fundamental cosmic fact. ... I was this fact; or perhaps it would be more accurate to say that this fact occupied the place where I had been. ... And the things which had entirely filled my attention on that first occasion, I now perceived to be temptations – temptations to escape from the central reality into a false, or at least imperfect and partial Nirvanas of beauty and mere knowledge."[76] The experience made its way into the final chapter of Island.[77] This raised a troublesome point. Was it better to pursue a course of careful psychological experimentation.... or was the real value of these drugs to "stimulate the most basic kind of religious ecstasy"?[75]


A variety of influences have been claimed for the book. The psychedelic proselytiser, Timothy Leary, was given the book by a colleague soon after returning from Mexico where he had first taken psilocybin mushrooms in the summer of 1960. He found that The Doors of Perception corroborated what he had experienced 'and more too'.[78] Leary soon set up a meeting with Huxley and the two became friendly. The book can also be seen as a part of the history of entheogenic model of understanding these drugs, that sees them within a spiritual context.[79] Looking to broader culture, Huxley's experiment can be seen, alongside the work of other artists such as John Cage and Jackson Pollock, as proposing a model of the imagination opposite to the symbolic, representational structures that had governed Western thought for centuries. Although this new direction cannot be attributed entirely to mescaline or Huxley, it had made a strong impact on politics, art and religion.[80]

Cultural references

This book was the influence behind Jim Morrison's naming his band The Doors in 1965.[81]

Publication history

The Doors of Perception is usually published in a combined volume with Huxley's essay Heaven and Hell (1956).

  • The Doors of Perception and Heaven and Hell, 1954, 1956, Harper & Brothers
    • 1977 Harpercollins (UK), mass market paperback: ISBN 0-586-04437-X
    • 1990 Harper Perennial edition: ISBN 0-06-090007-5
    • 2004 Harper Modern Classics edition: ISBN 0-06-059518-3
    • 2004 Sagebrush library binding: ISBN 1-4176-2859-6
  • The Doors of Perception, unabridged audio cassette, Audio Partners 1998, ISBN 1-57270-065-3

See also


  1. ^ Huxley, Aldous (1954) The Doors of Perception, Chatto and Windus, p. 15
  2. ^ Lower Pecos and Coahuila peyote: new radiocarbon dates. Terry M, Steelman KL, Guilderson T, Dering P, Rowe MW. J Archaeological Science. 2006;33:1017–1021.
  3. ^ About Dr. Arthur Heffter Hefter Research Institute Site
  4. ^ Powell, Simon G Mescaline, An Overview
  5. ^ Grob, Charles S. Psychiatric Research with Hallucinogens: What have we learned? | The Psychotomimetic Model Yearbook for Ethnomedicine and the Study of Consciousness, Issue 3, 1994
  6. ^ Jay, Mike (2010) High Society: The Central Role of Mind-Altering Drugs in History, Science, and Culture P. 103 Park Street Press, ISBN 1-59477-393-9
  7. ^ Letter to T.S. Eliot, 8 July 1936; Smith, Letters of Aldous Huxley, pp. 405–6
  8. ^ Dunaway, David King, p. 133
  9. ^ Woodcock, George (1972) Dawn and the Darkest Hour: A study of Aldous Huxley, p. 274, Faber & Faber, ISBN 0-571-08939-9
  10. ^ Bedford, Sybille (1974) Aldous Huxley: A Biography, Volume Two: 1939–1963 p. 144, Chatto & Windus, ISBN 0-00-216006-4
  11. ^ Huxley, Aldous (1952), The Devils of Loudon, Chatto & Windus
  12. ^ Woodcock (1972) p. 275
  13. ^ a b Bedford (1974) p. 144
  14. ^ Woodcock (1972) p. 274
  15. ^ a b Bedford (1974) p. 142
  16. ^ Murray, Nicholas (2003) Aldous Huxley, p. 399, Abacus ISBN 0-349-11348-3
  17. ^ Bedford(1974) p. 145
  18. ^ Murray (2003) p. 399
  19. ^ Bedford (1974) p. 145
  20. ^ Peggy Kiskadden in Dunaway, David King (1998) Aldous Huxley recollected: an oral history, p. 97 Rowman Altamira ISBN 0-7619-9065-8
  21. ^ Dunaway, David King (1989), pp. 228–300
  22. ^ Bedford (1974) p. 163
  23. ^ a b c Murray (2003) p. 401
  24. ^ Morris Eaves, Robert N. Essick, and Joseph Viscomi (ed.). "The Marriage of Heaven and Hell, object 14 (Bentley 14, Erdman 14, Keynes 14)".  
  25. ^ Bedford (1974) p. 146
  26. ^ Murray (2003) p. 400
  27. ^ Blake, William (1790) The Marriage of Heaven and Hell Plate 14
  28. ^ Huxley, Aldous (1990) The Perennial Philosophy, pp. 107, 189, Perennial, ISBN 0-06-090191-8
  29. ^ Dunaway, David King (1989) p. 283
  30. ^ Huxley (1954) p. 11
  31. ^ Huxley (1954) p. 15
  32. ^ Huxley (1954) pp. 16–7
  33. ^ Huxley (1954) p. 19
  34. ^ Huxley (1954) pp. 21–25
  35. ^ Huxley (1954) p. 27
  36. ^ Huxley (1954) pp. 29–33
  37. ^ Huxley (1954) p. 33
  38. ^ Huxley (1954) pp. 39–40
  39. ^ Huxley (1954) pp. 41–46
  40. ^ Huxley (1954) p. 48
  41. ^ Huxley (1954) p. 49
  42. ^ Huxley (1954) pp. 55–58
  43. ^ Huxley (1954) p. 63
  44. ^ LaBarre, Weston Twenty Years of Peyote Studies, Current Anthropology, Vol. 1, No. 1, (Jan. 1960) pp. 45–60
  45. ^ Huxley, Aldous (1954) Dust Jacket
  46. ^ Watt, Conrad (1997) Aldous Huxley, pp. 394–395 Routledge ISBN 0-415-15915-6
  47. ^ Bedford (1974) p. 155
  48. ^ Bedford, Sybille (1974) p. 156
  49. ^ Dunaway, David King (1989) p. 297
  50. ^ Sargant, William Chemical Mysticism, British Medical Journal, Vol. 1, No. 4869 (1 May 1954), p. 1024
  51. ^ Ronald Fisher quoted in Louis Cholden, ed. Lysergic Acid Diethylamide and Mescaline in Experimental Psychiatry, p. 67, Grune and Stratton, 1956
  52. ^ Meerloo, Joost A.M. Medication into Submission: The Danger of Therapeutic Coercion, Journal of Nervous Mental Diseases, 1955, 122: 353–360
  53. ^ Novak, Steven J. LSD before Leary: Sidney Cohen's Critique of 1950s Psychedelic Drug Research, Isis, Vol. 88, No. 1 (Mar. 1997), pp. 87–110
  54. ^ Novak, Steven J. (1997)
  55. ^ Buber, Martin (1965) The Knowledge of Man: Selected Essays ed Maurice S. Friedman, Harper & Row
  56. ^ Richards, William A. Entheogens in the Study of Religious Experiences: Current Status, Journal of Religion and Health, Vol. 44, No. 4 (Winter, 2005), pp. 377–389
  57. ^ Zaehner, RC (1957) Mysticism Sacred and Profane, Clarendon Press, p. 3
  58. ^ a b Zaehner p. 25
  59. ^ Zaehner p. 3
  60. ^ Huxley, Aldous (1955), The Doors of Perception, p. 49
  61. ^ Zaehner p. 18
  62. ^ Zaehner, p. 26
  63. ^ Zaehner p. 19
  64. ^ Zaehner, Introduction p.xi
  65. ^ Zaehner p. 28
  66. ^ Murray (2003) p. 403
  67. ^ Huxley, Aldous, Eds. Horowitz, Michael and Palmer, Cynthia Moksha: Aldous Huxley's Classic Writings on Psychedelics and the Visionary Experience, p. 214. Park Street Press, ISBN 0-89281-758-5
  68. ^ a b c Huston Smith (1964) Do Drugs Have Religious Import? The Journal of Philosophy, 61, 18
  69. ^ Dunaway, David King (1989) p. 300
  70. ^ Dunaway, David King (1989) p. 327
  71. ^ Dunaway, David King (1989) p. 298
  72. ^ Dunaway, David King (1989) p. 330
  73. ^ Dunaway, David King (1989) p. 369
  74. ^ Thody, Philip (1973) Aldous Huxley Leaders of Modern Thought, Studio Vista, ISBN 0-289-70189-9
  75. ^ a b Stevens, Jay (1998) Storming Heaven: LSD and the American Dream, pp. 56–57, Grove Press, ISBN 0-8021-3587-0
  76. ^ Letter to Humphry Osmond, 24 October 1955. in Achera Huxley, Laura (1969) This Timeless Moment. P.139, Chatto & Windus
  77. ^ Achera Huxley, p. 146
  78. ^ Leary, Timothy (1968) High Priest, New World Publishing
  79. ^ Richard, William A. Entheogens in the Study of Religious Experiences: Current Status, Journal of Religion and Health, Vol. 44, No. 4 (Winter, 2005), pp. 377–389
  80. ^ Boon, Marcus (2005) The Road of Excess: A History of Writers on Drugs Harvard University Press, p. 251 ISBN 0-674-00914-2
  81. ^ Simmonds, Jeremy (2008). The Encyclopedia of Dead Rock Stars: Heroin, Handguns, and Ham Sandwiches. Chicago: Chicago Review Press. p. 45.  
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