绝望最常见的形式不是做你自己。

"The only limit to our realization of tomorrow will be our doubts of today."

Mathematics is not a deductive science—that's a cliché. When you try to prove a theorem, you don't just list the hypotheses and then start to reason. What you do is trial and error, experimentation, guesswork.

Once we dreamt that we were strangers. We wake up to find that we were dear to each other.