All the orthodox systems of Indian philosophy have one goal, the liberation of the soul through perfection. The method is by Yoga. The subject of the present book is that 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. This book comprises several lectures to classes delivered by the present writer in New York.
Simple and specific directions are given for the student who wants to practice, but all such are especially and earnestly reminded that, with few exceptions, Yoga can only be safely learnt by direct contact with a teacher. If these conversations succeed in awakening a desire for further information on the subject, the teacher will not be wanting.