Eckhart Tolle argues that consciousness is the only thing you can know for certain. Without it, there would be no perception of anything, whether you're awake or dreaming. Consciousness is the unchanging foundation in which all experience appears.
What is it about myself that is absolutely beyond doubt, that I can know for sure? And that, that which you can know for sure is consciousness. There is a consciousness in which whatever you're perceiving is perceived. If you were not conscious, you would not be perceiving this room or anything in it. Even if it's a dream, there must be a consciousness in which the dream appears. So whether or not it's reality or dream makes no difference to the more fundamental question of
Why alcohol feels like relief, and what it is really giving you | Eckhart Tolle
