The publication offered to the attention of readers can be considered as a holistic and complete practical guide to personal self-development. The book is a unique example of a comprehensive explanation of the most complex fundamental issues of existence and at the same time the subtlest nuances of practical inner work at a level corresponding to the understanding of both an experienced spiritual seeker and a child taking his first steps in understanding himself and the world. The publication is intended for everyone interested in issues of self-knowledge, internal development, philosophy and spiritual practice.