"To understand who we are, we must first understand where we come from."
要理解我们是谁,我们必须首先理解我们来自哪里。
The chief enemy of creativity is 'good' sense.
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.