“Philosophy is an unusually ingenious attempt to think fallaciously.”

“Philosophy is "an unusually stubborn attempt to think clearly.”

“The flame consists of a splendid clarity, of an unusual vigor, and od an ingenious ardor, but possesses the splendid clarity that it may illuminate and the ingenious ardor that it may burn.”

“Philosophy arises from an unusually obstinate attempt to arrive at real knowledge. What passes for knowledge in ordinary life suffers from three defects: it is cocksure, vague and self-contradictory. The first step towards philosophy consists in becoming aware of these defects, not in order to rest content with a lazy scepticism, but in order to substitute an amended kind of knowledge which shall be tentative, precise and self-consistent.”

“That the universe was formed by a fortuitous concourse of atoms, I will no more believe than that the accidental jumbling of the alphabet would fall into a most ingenious treatise of philosophy.”

“If you want to be sure of unusual thing such as aliens or UFOs, then you have to think about it from an unusual way of thinking.”