I believe that used responsibly and in a mature way, the entheogens mediate access to the numinous dimensions of existence, have a great healing and transformative potential, and represent a very important tool for spiritual development.
Stanislav GrofLSD is a catalyst or amplifier of mental processes. If properly used it could become something like the microscope or telescope of psychiatry.
Stanislav GrofMany instances exist of small children who seem to remember and describe their previous life in another body, another place, and with other people. These memories emerge usually shortly after these children begin to talk.
Stanislav GrofThe experiences associated with death were seen as visits to important dimensions of reality that deserved to be experienced, studied, and carefully mapped.
Stanislav Grof