The aim of this work is to focus the attention on the concepts of psyche and of self, or better the participatory dialogue between the self and the world, to highlight the contribution that the Integral Transpersonal Psychotherapy (ITP) approach of Biotransenergetics (BTE) offers. I focus on the integral transpersonal approach which sees the psyche as the totality of the being and the self as the unifying archetype that defines it. After a journey into the phenomenology of the self, I outline some new epistemological maps and concepts to highlight their usefulness for a clinical and research methodology based on assumptions of a transpersonal and integral order.