"I never remember feeling tired by work, though idleness exhausts me completely."

"The more bizarre a thing is the less mysterious it proves to be. It is only the commonplace that truly puzzles."

"There is nothing more stimulating than a case where everything goes against you."

"Crime is common. Logic is rare."

"What you do in this world is a matter of no consequence. The question is what can you make people believe you have done."