This powerful technology of yoga! When you practice concentration on one object long enough it leads to a state of meditation, and this leads to the state of Samadhi — where it is as if you have peeled off the layers of body, mind, and ego, and you get to experience the true nature of your Self. What is left over in the stillness, when there is no more body, mind, and ego? You. The part of you that is Pure Consciousness.