A classic account of the psychedelic experience The Joyous Cosmology is Alan Watts's exploration of the insight that the consciousness-changing drugs LSD, mescaline, and psilocybin can facilitate "when accompanied with sustained philosophical reflection by a person who is in search, not of kicks, but of understanding." More than an artifact, it is both a riveting memoir of Watts's personal experiments and a profound meditation on our perennial questions about the nature of existence and the existence of the sacred.