"Books can be mirrors, windows, and sliding glass doors."

Own only what you can always carry with you: know languages, know countries, know people. Let your memory be your travel bag.

What can be said at all can be said clearly; and whereof one cannot speak thereof one must be silent.

最重要的是忠于自己。

你必须愿意冒险，走出你的舒适区。

耐心和坚持是解开数学之谜的关键。