his activities as a research associate. It was during this period of time that he became an apprentice of Fritz Perls and part of the early Gestalt Therapy community, where he began conducting workshops at Esalen Institute as a visiting associate. He eventually became one of Perls' three successors, along with Jack Downing (1924-1993) and Robert Hall (1934-2019). In the years that led up to his becoming a key figure at Esalen, Naranjo also received additional training and supervision from Jim Simkin in Los Angeles and attended sensory awareness workshops with Charlotte Selver. He became Carlos Castaneda's close friend and became part of Leo Zeff's pioneering psychedelic therapy group (1965–66). These meetings resulted in Naranjo’s contribution of the use of harmaline, MDA, and ibogaine. In the 1960s, Naranjo introduced ibogaine and harmaline into psychotherapy as a "fantasy enhancing drug." Richard Evans Schultes allowed for Naranjo to make a special journey by canoe up the Amazon River to study yage with the South American Indians. He brought back samples of this drug and published the first scientific description of the effects of its active alkaloids. In 1969 he was sought out as a consultant for the Education Policy Research Center, created by Willis Harman at Stanford Research Institute. His report as to what in the domain of psychological and spiritual techniques in vogue was applicable to education later became his first book, The One Quest. During this same period, he co-authored a book with Robert Ornstein on meditation. Also, an invitation from Ravenna Helson to examine the qualitative differences between books representative of the "Matriarchal" and "Patriarchal" factors lead to his writing The Divine Child and the Hero, which would be published at a much later time. The accidental death of his only son in 1970 marked a turning-point in his life. Naranjo set off on a six-month pilgrimage under the guidance of Oscar Ichazo (1931-2020), the founder of Arica school, who applied Enneagrams in his integral philosophy. Naranjo considered this spiritual retreat in the Atacama desert near Arica, Chile, to be the true beginning of his spiritual experience, contemplative life and inner guidance. After leaving Arica, he began teaching a group that included his mother, Gestalt trainees and friends. This Chilean group, which began as an improvisation, took shape as a program and originated a non-profit corporation called the SAT Institute. These early years of the SAT Institute were implemented