The skilled handling of one's own consciousness - the inner world - is one of the key competencies of the 21st century. By exploring and shaping their inner world through physical, mental, emotional, energetic, and spiritual dimensions, individuals can give essential areas of their lives a completely new quality and successfully transform the outer world as well. This book describes the structure and functioning of the inner world and provides the reader with practical techniques. It combines the knowledge of ancient wisdom traditions with the latest findings from quantum physics, as well as brain, consciousness, and meditation research. This comprehensive work is a valuable guide for anyone looking to solve recurring problems and lay the foundation for holistic health and happiness.