The best way to learn mathematics is to do mathematics.

I don't count my sit-ups. I only start counting when it starts hurting.

The mathematician's best work is art, a high perfect art, as daring as the most secret dreams of imagination, clear and limpid.

Mental activity is always directed toward some end.

数学之美不在于其复杂性，而在于其简洁性以及它揭示隐藏真理的方式。

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

你可以在我唱之前试着从这张纸上读我的歌词，但在我说出来之前，你无法消除这些词的刺痛。

One does not ask of one who suffers: What is your country and what is your religion? One merely says: You suffer, that is enough for me.