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

我们与土地的联系不仅是物理的，而且是精神的。

【释义】多次迁徙而没有固定的居所，但只要心如长者，就不会有忧患。

"The past is always tense, the future perfect."

In mathematics, the art of proposing a question must be held of higher value than solving it.

解决数学问题的过程往往比解决方案本身更重要。