"Consciousness is not rooted in the body; the body is just an abode. As you come out of your house and go in, consciousness can come out of the house and go in. Only consciousness can come out of this whole mechanism and look at things, what is happening.
In nirvichara samadhi this happens - thoughts cease. The connection between the mind and the consciousness is cut, because thought is the connection. Without thought you don't have any mind, and when you don't have any mind the connection with the brain is broken. And when you don't have any mind and the connection with the brain is broken, the connection with the nervous system is broken. Your consciousness now can float out and in; all doors are open. In nirvichara samadhi, when thoughts cease, consciousness is free to move and float. It becomes like a cloud without any roots, without any home. It becomes free of the mechanism you have lived with. It can come out, it can go in; there is no hindrance on its path."
Yoga: The Alpha and the Omega, Vol 3, Ch 9