Yoga is a subject of very wide scope with a broad base of philosophical thought and occult experience. It contains knowledge on the inner aspects of man's life. The knowledge of Science too is of help in understanding, as is seen from the many scientific illustrations used in this book.
In the initial chapters, the yogic significance of the Siva-Stotra, Brahma-stotra and Guru-stotra are explained. The other topics dealt with are the nature of consciousness, the control of mind, desire (vasana), samadhi ( not to be equated with trance), and the doctrine of the three guna-s, which have become an integral part of the philosophy and psychology of Yoga.
While the author's other work The Science of Yoga is a commentary on Patanjali's Yoga-sutra-s, this book is an independent and extensive exposition on other aspects of Yoga.