An extensive study of Yoga. The first half of the book details the nature and rewards of the many forms of yoga. The second half of the book is an in depth study of Surat Shabd Yoga, the Yoga of the Celestial Sound Current, which the author states is "the Crown of Life". Addressing the seeker regarding Surat Shabd Yoga the author completes his preface to the book with the following message:
"..And above all, he will, I hope, realize that mergence with the Supreme Lord is no mere daydream or hypothetical postulate of a monistic school of philosophy, but a living possibility whose realization is the true end of human existence and whose attainment, given the right guidance, the right method and the right effort, lies within the reach of all, irrespective of age, sex, race or creed."