问题的数学表述通常比其解决方案更重要，后者可能仅仅是数学或实验技巧的问题。

"The only way to deal with an unfree world is to become so absolutely free that your very existence is an act of rebellion."

你不能回头看，你只能把过去抛在脑后，在未来找到更好的东西。

The greatest gift music gives us is the ability to feel deeply.

一本书是作家与读者跨越时间的对话。