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.

I've always been a private person, but I understand that comes with the territory.

释义：当过去被否定、未来令人恐惧时，人便活在现实的煎熬中。

【讲解】：在实行仁德之事的时候对自己的老师也不要谦让。