Psychologists have pursued the mind into that lump of greyish-yellow protein, that most complex of all organisms, the brain. They have triumphantly concluded that brain and mind are one and the same thing. Philosophy says that it is a mistake to identify the fact of general awareness--which no one can pursue simply because he is awareness itself--with a particular faculty of awareness as shown by some part of the brain. Brain is physical, consciousness is mental.
-- Notebooks Category 21: Mentalism > Chapter 1: The Sensed World > # 100