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.
【释义】如果声誉超过了实际的才德，君子就会对此感到羞耻。
我们必须像投资技术一样投资于我们的人才。
He must learn to face his fears. He will not be three forever. And winter is coming.