对我来说，无畏不是没有恐惧。不是完全不害怕。对我来说，无畏是有恐惧。无畏是有怀疑。很多怀疑。对我来说，无畏是尽管有那些让你害怕得要死的事情，仍然生活下去。
To me, fearless is not the absence of fear. It's not being completely unafraid. To me, fearless is having fears. Fearless is having doubts. Lots of them. To me, fearless is living in spite of those things that scare you to death.
I'm interested in the edges of things.
The essence of mathematics lies in its freedom.
我们完全可能是在从错误的侧面考察世界，要找到有关世界的正确答案，也许需要改变视点、从世界的另一面考察它，即从心理内部而非心理外部考察。
外交是一门艺术，要耐心、智慧和灵活性。
I'm not afraid to take an unpopular stand.
A world without books is a world without light.