Carl Albrecht was a doctor when he first came into contact with the relaxation exercises of autogenic training. This marked the beginning of his "journey inward." He started to develop his own technique of immersion, which gradually led him to a profound mystical experience. As a person of the 20th century, scientifically trained in rational thinking, his inner experiences posed an immense challenge: he had to reconcile what he perceived internally with the clear light of reason. Albrecht accepted this challenge - and mastered it. This book is a crucial building block for a spiritual experience arising from an enlightened consciousness. It shows paths that enable mystical recognition from a super-rational clarity. A significant contribution to affirm Karl Rahner's far-sighted words: "The Christian of the future.".