The evening’s the best part of the day. You’ve done your day’s work. Now you can put your feet up and enjoy it.

Traveling is for me a source of rejuvenating vitality.

大脑是一台匆忙下结论的机器。

数学的本质不是使简单的事情复杂化，而是使复杂的事情简单化。

只要能够改变你自己的头脑，你就可以永远保持年轻。