RR Griffiths, WA Richards, U McCann, R Jesse. 2006. "Psilocybin can occasion mystical-type experiences having substantial and sustained personal meaning and spiritual significance." Psychopharmacology (Berl). 187(3), 268-83, commentaries 284-292.

The common characteristics of extrovertive mystical states of mind as evidenced in these seven typical and representative samples selected from different periods, lands, and cultures.

There has recently been a renewal of human research with classical hallucinogens (psychedelics). This paper first briefly discusses the unique history of human hallucinogen research, and then reviews the risks of hallucinogen administration and safeguards for minimizing these risks.

The need for a practical manual for the use of LSD has become increasingly apparent to those concerned with psychedelic issues over the past four years. With more and more laymen taking LSD and similar drugs, and with the supposed experts having nothing more instructive to say than “don’t,” the beginning user often has nowhere to turn for the most fundamental information.

Taoist philosophy is extremely interesting when looking at it within the context of the psychedelic experience. Whilst there is largely a consensus regarding the subjectivity of the psychedelic experience there are certain common aspects which seem to permeate the experience from individual to individual…

In a study of nearly a hundred people who took a psychedelic, guided as outlined in this manual, seventy-eight percent reported, “It was the greatest experience of my life.” This response was true even for those people who had taken a psychedelic many times before.

People have long sought to enrich their lives and to awaken to their full natures through spiritual practices including prayer, meditation, mind-body disciplines, service, ritual, community liturgy, holy-day and seasonal observances, and rites of passage.