The world is what it is; men who are nothing, who allow themselves to become nothing, have no place in it.

Understanding the limits of computation is as important as understanding the capabilities.

Every decision we make today shapes the world we will live in tomorrow.

我开始相信，一位伟大的教师是一位伟大的艺术家，而且像其他伟大的艺术家一样稀少。教学甚至可能是最伟大的艺术，因为媒介是人的思想和精神。

我不怕死，我怕不去尝试。