Sanislav Grof has combined the European tradition of depth psychology with William James’s American pluralism under the rubric of Transpersonal Psychology. He captures the final vision of Maslow, the integration of spirituality into the psychological picture of mind and body.
To understand and explicate Grof’s work fully requires invoking a metaphysical perspective that draws significantly on the Platonic tradition embraced and developed by Whitehead. It requires a model of the self that is epochal and polar, rather than an epiphenomenon of neurological matter or a particle of Mind.
From Lenny’s paper, Peace in Society and in Psychotherapy, in “Recent Advances in the Creation of a Process-Based Worldview,” edited by Lukasz Lamza and Jakub Dziadkowiec, Cambridge Scholars Publishing, 2016.