A journey is a person in itself; no two are alike. And all plans, safeguards, policing, and coercion are fruitless. We find after years of struggle that we do not take a trip; a trip takes us.

The man who speaks to you of sacrifice, speaks of slaves and masters. And intends to be the master.

我们写的每一个方程都是理解宇宙的一小步，但旅程是无限的。

Morality binds and blinds. It binds us into ideological teams that fight each other as though the fate of the world depended on our side winning each battle. It blinds us to the fact that each team is composed of good people who have something important to say.

Every problem in mathematics has a solution; it's just a matter of finding the right path.

Education is not about filling a bucket, but about lighting a fire.