Meditation is when every movement and action of yours emanates from your Self. Meditation is a state of non-doing. If you can sit silently doing nothing, suddenly you are back home to your Self, you see the source and the source is satchitananda, it is truth, consciousness, it is bliss, call it God, nirvana or whatever. Nirvana-the attainment of Being implies the cessation of the process of becoming.

Meditation is not some strange phenomena. There is already an element of meditation in our lives. We concentrate do we not, on studying, exercising, while driving a car, that is meditation too, but twin factors prevent these from being really meditation. Our agitated minds and the fact that we are concentrating on mundane thing. But if we simply turn the same concentration onto our minds view it with clarity, understand its motives, watch choicelessly, and so resolve the conflict within the mind then only shall meditation be what it truly is-it shall liberate your mind because you shall be aware of every thought but not be entangled in it you shall know the source from where the thought springs, and you shall know its intention. In knowing all this will be the thoughts instant dissolution. Try it, It works, out of right thinking comes meditation, from meditation comes self-knowledge thereon comes a tranquility and in that serene state the highest is realised-the true self is recognized.

The Kena Upanishads says -
"That which is not thought by the mind but That by which the mind thinks-know That as the Absolute.