The book examines the philosophical and natural science foundations of experiential psychotherapy. In particular, we are talking about the concept of primary experience. The author takes a rather deep excursion into philosophy, as well as into the basic foundations of quantum physics. The book also sets out in some detail the essence of field theory, which underlies experiential psychotherapy. Based on all this, an original model of psychotherapy is proposed, which has enormous resources for transforming a person and the reality of his life. For Gestalt therapists, practical psychologists, psychotherapists, social educators, social workers, as well as graduate students and students of psychological specialties.