我不害怕说出自己的想法。

The most important thing in mathematics is to understand the concepts, not just to memorize the formulas.

I know you are here to kill me. Shoot, coward, you are only going to kill a man.

Change the way you look at things and the things you look at change.

走向自由，不管在哪，都没有轻松的道路；多数人在到达渴望的巅峰之前，都必须一次又一次穿过被死亡阴影所垄罩的幽暗山谷。