The matter in this book comprises given in very simple language avoiding technical terms as far as possible. They are easy to understand as they were originally addressed to a group of persons who were strangers to Indian philosophical thoughts and the subject of Yoga-Darshana. It was a new subject and the field was unfamiliar to their thought-forms. As such, these talks were necessarily made simple for them to grasp. An orderly sequence was attempted makes at the time of their delivery. Therefore this arrangement makes the present volume something in the nature of a primary textbook on Patanjali Yoga. Hence it is felt that it may be of some value to beginners and would help them to get a preliminary knowledge of Ashtanga Yoga.