"Grof has always been one of the most original thinkers in the transpersonal field, and his creativity meets the maturity of his global vision."

(Michael Washburn)

"The Work of Stanislav Grof is the most important contribution to personality theory in many decades."

(Abraham Maslow)

"I lived for over 10 years at the Esalen Institute in Big Sur, California where I was a program director. Over the course of those years, virtually every form of therapy and personal transformation, large and small, went through Esalen. In terms of therapeutic effectiveness , Grof's Holotropic breath was by far the most powerful, there was no comparison "

Richard Tarnas

"Grof displays an impressive collection of data in support of the perennial demand that Western science fully recognize consciousness and its many non-ordinary states."

(Richard Alpert - Ram Dass)

"Stanislav Grof is probably the brightest mind in psychology today"

(Fred Alan Wolf)

“With Holotropic breathing Stan and Christina have united scientific understanding with intellectual, masculine and feminine, as well as ancient and post-modern wisdom, and have made their work and training available to people on all continents. I believe that in time his contribution will be considered a great gift for the field of psychology and for the healing of the world. "

(Jack Kornfield)

"In deep psychology, the most important advance since S. Freud and C.G Jung is the work of Stanislav Grof"

Richard Tarnas

"Holotropic breathing is one of the most profound and comprehensive works of the spirit offered today."

(Jack Kornfield)