The present small book consists of lectures delivered by the author several years ago on the essentials of the yoga system as propounded by the Sage Patanjali. These lessons were intended particularly for students who required a special clarity of this intricate subject, and the approach has been streamlined accordingly in a form and style commensurate with the receptive capacities of the students.
The section on pratyahara is especially noteworthy and students of yoga would do well to go through it again and again as a help in internal training.
—THE DIVINE LIFE SOCIETY
20th February, 1981