The cosmic sound vibration which is the source of, and includes, all other sounds and vibrations. OM is the absolute Brahman as sound and the foundation of all mantras. It is composed of the letters A, U, and M, which respectively represent creation, evolution and dissolution, or the waking, dreaming and dreamless sleep states. Beyond these states is a fourth, the anahata or unrepeated. (See sutra 1.27, in which the word “pranava”, or humming, is equivalent to OM.) ojas – A subtle energy that enlivens the body and mind. It is accumulated in many ways but is particularly associated with the preservation of sexual energy. Poor diet, overwork, anger, stress and worry deplete ojas, while the opposite conditions increase it. When ojas becomes chronically low, it leads to degenerative disease and premature aging. Although ojas is present throughout the body, it is especially associated with the heart.