I don't have any particular recipe [for developing new proofs] ... It is the reason why doing research is challenging as well as attractive. It's like being lost in a jungle and trying to use all the knowledge that you can gather to come up with some new tricks, and with some luck you might find a way out.

The study of psychology is the study of adaptive success.

文学和科学相比，的确没什么用处，但文学最大的用处，也许就是它没有用处。