Raymond Smullyan

“Why are we here? We're here to go!”

“Every improvement in communication makes the bore more terrible.”

“Logic is a wonderful thing, but it doesn't solve everything.”

“Some people are born good-natured; others have to achieve it.”

“Is it not crystal clear, then, that logic is not a matter of psychology?”

“It is not the conscious will that is the problem, but the conscious will trying to do the work of the unconscious.”

“All the interesting things in the world are contradictions.”

“I have a great love for paradox. I think it's a fascinating subject.”

“Mathematics is not a spectator sport.”

“Humor and seriousness are not in opposition.”

“To me, the paradox is the source of all my philosophical inspiration.”

“The fact that a sentence is meaningless does not mean it is not true.”