It was extraordinary to be in two places at once, doing two different things — extraordinary, but not confusing. He merely had two bodies which were … - Brian Aldiss

Only a madman would claim that there is some thing unreal about reality.

Life was a pleasure; he looked back at its moments, many of them as much shrouded in mist as the opposite bank of the Thames; objectively, many of them held only misery, fear, confusion; but afterwards, and even at the time, he had known an exhilaration stronger than the misery, fear, or confusion. A fragment of belief came to him from another epoch: 'Cogito ergo sum'. For him that had not been true; his truth had been, 'Senito ergo sum'. I feel so I exist. He enjoyed this fearful, miserable, confused life, and not only because it made more sense than non-life.

Digging deep in a Martian desert men discovered an enormous brain. It suddenly started to think at them — So they covered it up again...