"The trouble with most people is that they think with their hopes or fears or wishes rather than with their minds."

"The truth, however ugly in itself, is always beautiful in its expression."

"I don’t think necessity is the mother of invention. Invention, in my opinion, arises directly from idleness, possibly also from laziness—to save oneself trouble."

"I like to solve puzzles. I like to solve mysteries."

"If you confront anyone who has lied with the truth, he will usually admit it - often out of sheer surprise. It is only necessary to guess right to produce your effect."