When you solve a mathematical problem, you don't just get the answer - you understand why it's the answer.

乐观是一种可以学习的技能。一旦你学会了它，你就能在各个方面改善你的生活。

The peculiar evil of silencing the expression of an opinion is that it is robbing the human race； posterity as well as the existing generation； those who dissent from the opinion， still more than those who hold it.

I think fearless is having fears but jumping anyway.

我不想成为榜样。我想成为一个人。

艺术应该是危险的，就像黑暗中的刀子。