The only way to deal with an unfree world is to become so absolutely free that your very existence is an act of rebellion.

Happiness is not something ready made. It comes from your own actions.

When you want knowledge like you want air under water then you will get it.

做数学就是同时参与创造和发现的行为。

能源的未来在于传统能源与可再生能源之间的平衡。