Mathematics is the art of asking the right questions and then finding their answers.

There is no such thing as a moral or an immoral book. Books are well written, or badly written. That is all.

Poetry must always have a moral purpose; it should instruct while it delights.

在我们这个令人深思的时代，最令人深思的事情是我们仍然没有思考。

I don’t compete with anyone, I compete with myself.