The pen is mightier than the sword if the sword is very short, and the pen is very sharp.

The only way to do great work is to love what you do.

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.

与逆境不屈抗争，以无畏的气势面对敌人。