This book is a study in philosophy of religion, which proposes a new inversion model of self-transcendence. At the same time, the study examines the relation between self-transcendence and prosociality in order to broaden our understanding of self-transcendence also as a moral concept relevant to human behavior and its ethical reflection. The inversion model of self-transcendence is based both on the intentionality analysis of consciousness and phenomenological analysis of self-transcendence conducted on examples of great figures of spirituality from the East and the West - an anonymous medieval Christian author of "The Cloud of Unknowing", an Indian sage Ramana Maharshi, and a contemporary spiritual teacher Eckhart Tolle.