The purpose of this book is to bring together in a convenient and coherent form the many HERMES articles written by Prof. Iyer that dealt with this subject. In truth, meditation and self-study represent two sides of one human activity, something analogous to the operation of the systolic and diastolic movements of the human heart. The one is the centrifugal movement of consciousness expanding to Universals beyond the limits of Self; the other is the centripetal movement focusing with laser-like precision upon the particulars within the limits of Self. They represent roughly the sub-principles of Buddhi and Manas acting within the incarnated Manasic principle; for the spiritual aspirant they should - in time - become as natural as breathing in and breathing out. These two aspects of the inbreathing and outbreathing within the neophyte's consciousness are dealt with in the three treatises of The Voice of the Silence, as well as in Prof. Iyer's seminal article, Meditation and Self-Study.