The normal man thinks he is body plus mind, with emphasis on the body. But self-questioning and analysis show that, although he certainly has these two things and is certainly associated with them, the "I" is in fact neither of them. It is, by contrast, not changing and quite elusive. It is not in space, as the body is, nor in time, as the mind is. It is, in fact, a mystery. The attempt to find out what it is brings up the questions of existence, life, activity, and consciousness.
-- Notebooks Category 22: Inspiration and the Overself > Chapter 3: The Overself's Presence > # 340