The subject of this book is the form of Yoga known as Raja-Yoga. The aphorisms of Patanjali are the highest authority on Raja-Yoga, and form its textbook. The other philosophers, though occasionally differing from Patanjali in some philosophical points, have, as a rule, acceded to his method of practice a decided consent. The first part of this book comprises several lectures to classes delivered by the writer in New York. The second part is a rather free translation of the aphorisms (Sutras) of Patanjali, with a running commentary. *** The series "Large Print Reader's Choice" features classic books with a font size of at least 16 points. This font size is not only highly recommended and useful for visually impaired readers, but generally improves letter and word recognition and reading comprehension. Large print books make your reading experience a more satisfying one.