It is not because certain things are difficult that we do not dare;it is because we do not dare that things are difficult.

The best revenge is massive success.

I have so much to prove to myself. I want to be better. I want to be smarter. I want to be more talented. I want to be more efficient. I want to be more creative.

What we learn from history is that people don't learn from history.

I don't have to prove anything to anyone. There's nothing to prove.

【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。