"The saddest thing in life and the hardest to live through, is the knowledge that there is someone you love very much whom you cannot save from suffering."

"I’ve always believed in writing without a collaborator, because where two people are writing the same book, each believes he gets all the worry and only half the royalties."

"Crime is terribly revealing. Try and vary your methods as you will, your tastes, your habits, your attitude of mind, and your soul is revealed by your actions."

"I have always had a great respect for the law. I have always had a great respect for justice."

"Never tell everything you know. It's a good way to lose friends."