http://www.kundalinilive.com/stilling-the-thought-waves-of-the-mind

The art of yoga is stilling the thought waves of the mind. Everything we do in this class is to that effect. You still the thought waves while you’re conscious, you enter that state of sleep while you’re conscious and you go thru it. You find a way thru that threshold of consciousness and sub-consciousness. That’s the aim of yoga, to relax enough with enough energy in life to go thru that threshold consciously and by doing so you quiet your mind while still being conscious of yourself.