"Everyone is a potential murderer-in everyone there arises from time to time the wish to kill-though not the will to kill."

"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."

"The young people of today think of nothing but themselves. They have no respect for their elders, no sense of responsibility. And they are so rude!"

"Many homicidal lunatics are very quiet, unassuming people. Delightful fellows."

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