Contents: Introduction. 1. The nature of Yoga. 2. Schools of thought. 3. Yoga as science. 4. Yoga as practice.

"This book is a collection of four lecture of Annie Besant, delivered in 37 parts, at Benaras. The topics included, cover a broad range in the realm of spiritualism. The readers of any grade or stage may find in this book, the solution to his problems. The book may serve as a hand book to the Bhakta, Jnani as well as the Yogi, all alike but to the followers of path of knowledge, it will be more useful and appealing.

This book, perhaps still remains one of the best treatises on the practical understanding of Yoga. Yoga is a science, and not a vague, dreamy drifting or imagining. It is an applied science, a systematized collection of laws applied to bring about a definite end. It takes up the laws of psychology applicable to the unfolding of the whole consciousness of man on every plane, in every world, and applies those laws of unfolding consciousness acts exactly on the same principles that you see applied around you every day in other departments of science." (jacket)