Thus the material and mental, the physical and the psychical, body and mind, in a word, man's entire being, is conceived by us as belonging to the Ego or self as to its subject and possessor. Viewed introspectively, and judging from the expressions used by all men, the Ego is never referred to any deeper reality in man. The Ego, I, or self is the ultimate reality in man to which everything in man belongs, while the Ego itself does not belong to some more fundamental reality. Everything is united and unified in the Ego, and the Ego unites and unifies everything in man. Therein lies the profound problem of the human Ego.
Man certainly has a mind.
He also has a body. Contradictory attributes seem to exist in one and the same Ego. Man is, in many respects, like a jigsaw puzzle. Yet the two major portions of the complete picture, namely, body and mind synthesized in the Ego, do not seem to match. Philosophers, by a large, find it extremely difficult to effect the synthesis.