• The Biographical layer

Stanislav Grof operates with 3 categories in the human psyche:

Our personal history and our personal unconsciousness.

• The Perinatal layer

Stanislav Grof operates with 3 categories in the human psyche:

The encounter with birth and death, as they occur in the birth-trauma.

• The Transpersonal layer

Stanislav Grof operates with 3 categories in the human psyche:

The consciousness expanded beyond the usual ego boundaries,

beyond the usual orientation in time and space.