学问无大小，能者为尊。
释义：学问不论年长年幼，应该以某一方面擅长的人为师。学无先后，达者为师，体现了学问应该是一个开放的、无大小之分的领域，重在能力而非地位或者身份。
做一个有道德的人，就是要付出、必须付出某种关注。
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.