The worst thing you can do is to pretend to be something you're not.
The deeper you go into mathematics, the more you realize how much remains unknown.
【释义】凯根打破童年决定论:快乐童年未必护航成年,而经历过黑暗的孩子反而可能锻造韧性。
The only way to get through pain is to go through it.