Here he compares Janet’s discoveries concerning dissociation with the insights of Sigmund Freud and Carl Jung.

In this video from 2018, he explains his definition of a trance state and also delineates four different kinds of trance. He maintains that we are always in a state of trance of one type or another, in effect, going from trance state to trance state. He also points out that trance states can be [...]

In this 2018 video, he describes the gradual evolutionary process from thinking about “magnetic passes” and “animal magnetism” to somnambulism and hypnosis leading to the significant theory of Sigmund Freud regarding psychoanalysis and the unconscious mind. In particular, he points out many examples of paranormal phenomena that were encountered by the early hypnotic practitioners.

In this interview from 2018, he explains the problems confronting psychotherapists when confronted with cases of ostensible possession. Are the manifestations due to intrapsychic, subconscious dynamics? Or, has the manifestation resulted from the activity of an external psychic or spiritual entity. Both levels of causality may be involved. Crabtree shares some experiences from his psychotherapy [...]

Here he proclaims his belief that Friedrich Nietzsche (1844 – 1900) was the greatest philosopher of all time, because he understood more clearly than anyone else how previous philosophies and institutions undermined human freedom and human possibility. He highlights Nietzsche’s emphasis on the importance of psychological depth. He also reviews various biographical details and compares [...]

Here he explains that he is using the term hypnogogia to describe explorations of one’s psychic depths including, but not limited to, states associated with sleep and dreaming. He shares a number of his own hypnogogic journeys – starting at the age of five. He discusses the sense of dread that sometimes accompanies these encounters [...]