Everything should be built top-down, except the first time.

A man must strive to do his best, and then accept the consequences with equanimity.

The beauty of mathematics lies in its ability to describe the world in a precise and elegant way.

In looking for someone to hire, you look for three qualities: integrity, intelligence, and energy. But the most important is integrity because if they don't have that, the other two qualities, intelligence and energy, are going to kill you.

如果你能梦想它，你就能做到它。

Everything can be taken from a man but one thing: the last of the human freedoms—to choose one's attitude in any given set of circumstances.

A school should not just be a place to learn, but a place that inspires learning.