理性是冰冷的太阳，它给予光明却不给予温暖。

"Das Geheimnis der Freiheit ist der Mut."

Everything can be taken from a man but one thing: the last of the human freedoms—to choose one's attitude in any given set of circumstances.

The relation between what we see and what we know is never settled.

小说是反映世界的镜子，但也是打开新可能性的窗户。

I play every game like it is my last.

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.