The Western religious establishment has never known what to do with substances that produce visions of the divine.
For nearly two millennia, Christianity and its institutional descendants have maintained an uneasy relationship with entheogenic sacraments. That relationship has cycled through suppression, theological suspicion, cautious curiosity, and, most recently, a tentative reconsideration that challenges centuries-old assumptions. The story of how Western religion approached these substances reveals as much about religious authority as it does about the substances themselves.
Ancient Roots and Early Christian Ambiguity
Christianity emerged in a Mediterranean world saturated with mystical religions. The Eleusinian Mysteries, practiced for nearly two thousand years in ancient Greece, initiated participants into profound altered states through consumption of a ritual drink called kykeon. Some scholars, including ethnomycologist R. Gordon Wasson and chemist Albert Hofmann, have proposed that kykeon contained ergot alkaloids capable of producing visionary experiences similar to those induced by LSD. Recent archaeological evidence from a temple site at Mas Castellar de Pontós in Spain has lent support to this hypothesis. There, researchers discovered fragments of ergot both inside a ceremonial vase and within the dental calculus of a human jawbone at a sanctuary dedicated to Demeter and Persephone.
Brian Muraresku, author of The Immortality Key, has argued that early Christian communities may have inherited elements of these pagan practices. His research traces connections between the Greek mysteries and the earliest Christian Eucharist, though many scholars dispute this evidence. Christianity clearly developed in an environment where ritual substances capable of inducing visionary states circulated widely.
Jerry and Julie Brown, anthropologists who spent a decade documenting entheogenic imagery in Christian art, have catalogued images of what appear to be Amanita muscaria and psilocybin mushrooms in frescoes, illuminated manuscripts, mosaics, and stained glass windows across European churches and cathedrals. Their work suggests that knowledge of entheogenic substances persisted within certain Christian communities well into the medieval period, hidden in plain sight within religious iconography.
In summary: The early Church emerged amid widespread entheogenic practices and appears to have maintained an ambiguous relationship with these substances, absorbing certain elements while gradually distinguishing Christian ritual from its pagan predecessors.
Colonial Suppression and the Inquisition
The Spanish conquest of the Americas brought European Christianity into direct confrontation with indigenous entheogenic practices. Spanish missionaries and chroniclers immediately began documenting the use of peyote, psilocybin mushrooms (which the Aztecs called teonanacatl, meaning "divine mushroom"), and ololiuqui (an Aztec name for a compound containing ground morning glory seeds) among the peoples they encountered. Fray Bernardino de Sahagún, whose Florentine Codex provides invaluable accounts of Aztec life, described ceremonies where participants ate mushrooms with honey, experienced visions, danced, wept, and consulted the substances for divination and healing.
The colonial interpretation of these practices was swift and severe. Spanish authorities framed indigenous sacramental use as devil worship, idolatry, and witchcraft, drawing parallels between this and European witch-hunt narratives. By 1620, an Inquisitorial edict had been publicly posted throughout the cities of New Spain officially banning the use of peyote and other plants believed to produce visions. The edict specifically condemned these substances as tools for heresy, idolatry, and superstition.
For decades following this ban, Inquisitors in Mexico City continued prosecuting healers, primarily indigenous women, for the ceremonial use of these sacraments. Spanish priests burned Aztec herbalists at the stake. The suppression proved remarkably effective in some regions. Catholic persecution explains why modern Mexican communities using psilocybin exist only in remote mountain areas where colonial authority could not fully reach.
Indigenous communities responded with creative survival strategies. Pressures from the Inquisition forced practitioners into what scholars call protective syncretism, blending indigenous beliefs with elements of the imposed Catholic faith. By 1617, peyote had been associated with the Baby Jesus, and soon the Holy Trinity was overlaid onto traditional three-fold symbolic complexes. Indigenous peoples gave the cactus Catholic names like Santa María and Nuestra Señora, allowing practices to continue under a veneer of Christian devotion.
In summary: The colonial Church actively suppressed indigenous entheogenic practices as satanic, driving these traditions underground or into syncretic forms that persist to this day.
Twentieth-Century Encounters
The modern era brought unexpected shifts to how Western religious figures encountered entheogens. In the 1950s and early 1960s, before widespread criminalization, a number of significant Christian figures explored these substances with theological seriousness.
Captain Al Hubbard, a devout Catholic, became one of the most prolific evangelists for LSD in the 1950s, introducing the substance to at least one monsignor and attributing his work to an encounter with an angel. The Jesuit theologian John Courtney Murray, who had been publicly rehabilitated at the opening of the Second Vatican Council, traveled to Los Angeles in 1963 to take LSD in an experiment sponsored by The Fund for the Republic.
The most rigorous early investigation of entheogens in a Christian context was the 1962 Good Friday Experiment at Boston University's Marsh Chapel. Walter Pahnke, a graduate student who held degrees from both Harvard Medical School and Harvard Divinity School, administered psilocybin to ten Protestant divinity students during a Good Friday service. Civil Rights leader and minister Howard Thurman delivered the sermon while the seminarians sat in an auxiliary chapel below. The results were striking. Nearly all participants who received psilocybin reported experiences of profound unity, transcendence, and a deep sense of sacredness. In a 25-year follow-up study, all but one of the psilocybin recipients described their experience as genuinely mystical and characterized it as one of the high points of their spiritual lives.
Religious scholar Huston Smith, who participated in the experiment, described his experience as "the most powerful cosmic homecoming I have ever experienced." Rabbi Zalman Schachter-Shalomi, a founder of the Jewish Renewal Movement, was another convert to the spiritual potential of these substances during this period.
On the other hand, the Jesus Movement of the early 1970s presented a different picture. Many hippies who found Christianity through psychedelic experiences subsequently came to view these substances as instruments of satanic deception, placed alongside Tarot cards, yoga, and witchcraft as spiritual dangers to be avoided.
In summary: Twentieth-century Western religious encounters with entheogens ranged from serious theological exploration among Catholic intellectuals and Protestant seminarians to categorical rejection among evangelical converts from the counterculture.
Contemporary Theological Tensions
The current Catholic position, articulated in the Catechism, condemns drug use except "on strictly therapeutic grounds." This language has created space for nuanced debate. Some Catholic voices, including writers in America Magazine and The Jesuit Post, have argued that Catholics should take seriously the possibility that entheogens are morally permissible in therapeutic contexts, pointing to clinical research showing that psilocybin helps terminal cancer patients with depression and anxiety.
Other Catholic commentators take a harder line. Catholic Answers Magazine has argued that entheogenic experiences represent "an egregious offense against the Holy Spirit" and that embracing such substances as spiritual aids means "turning a willfully blind eye to the way holiness actually works." This view holds that the mystical experiences reported by entheogen users, however subjectively compelling, cannot constitute genuine encounters with God, who "doesn't obediently hop to and reveal himself because a human ate a mushroom."
A fundamental theological objection centers on the Christian understanding of grace. Protestant theologian H. Richard Niebuhr articulated this concern: "We can only prepare receptive hearts; we cannot force the gift. And the gift may come to a thief on the cross before it is extended to the righteous citizen or the ascetic monk." From this perspective, the ability to reliably induce mystical experiences through pharmacological means represents a challenge to divine sovereignty over human consciousness.
The Eastern Orthodox and Catholic sacramental traditions offer a different entry point. Rod Dreher, writing in The American Conservative, has noted that it is "compatible with the metaphysics of premodern Christian tradition—especially Eastern Christianity—to believe that God is everywhere present, and in some sense fills all things." From this perspective, if God can communicate through matter in the Eucharist, the question of whether entheogenic substances might also serve as conduits for divine encounter becomes more open.
In summary: Contemporary Western theology remains divided, with some voices opening toward therapeutic applications while others maintain that entheogenic experiences fundamentally conflict with Christian understandings of grace, divine sovereignty, and authentic spiritual development.
Recent Research and Religious Professionals
Between 2015 and 2017, researchers at Johns Hopkins University and New York University conducted a clinical trial that would have seemed unthinkable a generation earlier. They administered psilocybin to 29 clergy members from Christianity, Judaism, Islam, and Buddhism. The participants were all "psychedelically naïve," meaning they had never before used these substances.
The results published in 2025 in Psychedelic Medicine were remarkable. Ninety-six percent of participants rated their psilocybin experience as among the five most spiritually significant of their entire lives. Forty-two percent called it the single most profound experience they had ever had. Six months later, compared to a control group, participants reported significant improvements in their religious practices, attitudes about their faith, and effectiveness as spiritual leaders.
Episcopal priest Roger Joslin, who participated in the study, observed that "the Eucharist turned into a kind of mantra" following his sessions. "The residual effects stayed with me for a year. The liturgy now is more powerful than it's ever been." Rabbi Zac Kamenetz reported a similar deepening of his existing spiritual practices.
The study was not without controversy, however. The Johns Hopkins Institutional Review Board conducted an audit and found issues with undisclosed funding sources and conflicts of interest that were not properly managed during the research. Additionally, critics have raised concerns about whether researchers inappropriately influenced participants' interpretations of their experiences.
In summary: Contemporary clinical research with religious professionals suggests that entheogenic experiences can deepen rather than undermine existing faith commitments, though methodological concerns and theological objections continue to generate debate.
The Question of Authenticity
The core question that has animated Western religious responses across centuries remains unresolved: Can substances that alter consciousness provide access to genuine spiritual realities, or do they produce mere simulations of the sacred?
Research using the Mystical Experience Questionnaire has consistently found that experiences reported by entheogen users are phenomenologically indistinguishable from those described by mystics throughout religious history. Participants report the same qualities that William James identified as markers of mystical consciousness: ineffability, noetic quality, transiency, and passivity. They describe unity with all existence, transcendence of time and space, and encounters with sacred presence.
For some, this equivalence suggests that entheogens access the same spiritual realities that contemplatives have always sought through prayer, fasting, and ascetic practice. For others, the very reliability of the pharmacological trigger disqualifies the experience from counting as an authentic encounter with the divine. If grace can be bottled, perhaps it was never grace at all.
What remains clear is that the Western religious relationship with entheogens continues to evolve. Christian churches that once burned practitioners are now being asked to consider whether these same substances might serve legitimate therapeutic or even sacramental purposes. The answers that emerge will shape how future generations understand the boundaries between chemistry and spirit, between preparation and gift, and between seeking and receiving.
In summary: The Western religious encounter with entheogens reveals an ongoing tension between the desire to protect authentic spirituality from chemical shortcuts and the recognition that these substances consistently produce experiences indistinguishable from those described by mystics throughout history.
References
Brown, J.B. & Brown, J.M. (2016). The Psychedelic Gospels: The Secret History of Hallucinogens in Christianity. Park Street Press.
Brown, J.B. & Brown, J.M. (2019). Entheogens in Christian Art: Wasson, Allegro, and the Psychedelic Gospels. Journal of Psychedelic Studies, 3(2), 142-165.
Doblin, R. (1991). Pahnke's Good Friday Experiment: A Long-Term Follow-Up and Methodological Critique. The Journal of Transpersonal Psychology, 23(1), 1-28.
Griffiths, R.R. et al. (2025). Effects of Psilocybin on Religious and Spiritual Attitudes and Behaviors in Clergy from Various Major World Religions. Psychedelic Medicine.
Muraresku, B.C. (2020). The Immortality Key: The Secret History of the Religion with No Name. St. Martin's Press.
Wasson, R.G., Ruck, C.A.P. & Hofmann, A. (1978). The Road to Eleusis: Unveiling the Secret of the Mysteries. Harcourt Brace Jovanovich.