If you don’t make mistakes, you’re not working on hard enough problems.

The right of a nation to kill a tyrant in case of necessity can never be doubted until the right of a tyrant to kill a nation has been proved.

任何人都能成为历史，只有伟人能创造历史。

不是要无所畏惧，而是要克服恐惧并继续前进。