"The past is never dead. It's not even past."

War is an ugly thing， but not the ugliest of things； the decayed and degraded state of moral and patriotic feeling which thinks that nothing is worth war is much worse.

The behaviorist asks: Why don't we make what we can observe the real field of psychology?

我不记得活着的理由了，而我记得的时候，那个理由又没有说服力。

过去从未真正过去，它活在我们体内。

数学中真正的挑战不是解决问题，而是提出正确的问题。