Sacred Knowledge is the first well-documented, sophisticated account of the effect of psychedelics on biological processes, human consciousness, and revelatory religious experiences. Richards argues that, if used responsibly and legally, psychedelics have incredible potential to assuage human suffering and contribute to the quality of life. Part memoir, part manifesto, Sacred Knowledge charts the birth, death, and resurrection of psychedelic research. . . . The conclusion to be drawn from this book is that it's time-in a safe setting and with careful guidance-that we started taking our miracles in tablet form.