当一种程序语言的程序需要引起注意时，它是低级的。

——在广州全国青年联合会演说，1923年10月21日

A scientist’s greatest tool is an open mind.

If you're horrible to me, I'm going to write a song about it, and it won't be a good one for you.

Man is not the creature of circumstances； circumstances are the creatures of men.

We shall not cease from exploration, and the end of all our exploring will be to arrive where we started and know the place for the first time.