世界上有开朗的悲观主义者吗?我就是这样的人。
Is there such a thing as a cheerful pessimist? That's what I am.
孤独是我们为自我意识付出的代价。
学习的最好方式是教学。
The deepest theorems often have the simplest proofs - if you look at them from the right angle.