The concept of purpose has no place in a scientific account of behavior.

"The only way to get rid of a temptation is to yield to it."

"I work very slowly. It's a process of building up layers and adjusting until it feels right."

The more things a man is ashamed of, the more respectable he is.

The only person you should try to be better than is the person you were yesterday.

Every book is a journey, every page a step into the unknown.

美国是世界上最强大的国家，在可预见的未来仍将如此。