This illusory sense of self is what Albert Einstein, who had deep insights not only into the reality of space and time but also into human nature, referred to as “an optical illusion of consciousness.” That illusory self then becomes the basis for all further interpretations, or rather misinterpretations of reality, all thought processes, interactions, and relationships. Your reality becomes a reflection of the original illusion.
The good news is: If you can recognize illusion as illusion, it dissolves. The recognition of illusion is also its ending. Its survival depends on your mistaking it for reality. In the seeing of who you are not, the reality of who you are emerges by itself. This is what happens as you slowly and carefully read this and the next chapter, which are about the mechanics of the false self we call the ego.
Most people are still completely identified with the incessant stream of mind, of compulsive thinking, most of it repetitive and pointless. There is no “I” apart from their thought processes and the emotions that go with them. This is the meaning of being spiritually unconscious. When told that there is a voice in their head that never stops speaking, they say, “What voice?” or angrily deny it, which of course is the voice, is the thinker, is the unobserved mind. It could almost be looked upon as an entity that has taken possession of them.
Some people never forget the first time they disidentified from their thoughts and thus briefly experienced the shift in identity from being the content of their mind to being the awareness in the background. For others it happens in such a subtle way they hardly notice it, or they just notice an influx of joy or inner peace without knowing the reason
Excerpted from Eckhart Tolle’s A New Earth, pages 27-28