In the yoga texts there are various techniques of making our intelligence to be the chief-commander in our body disclosed. Who is the owner of the body? Intelligence is the closest to our soul, so the soul instructs it to take control of the body, and when the intelligence succeeds, we begin our spiritual development. One of the methods of activating the Intelligence is called mantra yoga. The OM mantra is included in all the Vedic mantras and called Pranava. It can be found in the Rig Veda, Sama Veda, Yajur Veda and Atharva Veda. It’s not just the sound, it is transcendental sound that is able to give strength to our intelligence.