数学中最深刻的思想往往来自最简单的问题。

I was born with an enormous need for affection, and a terrible need to give it.

The future of liberal democracy depends on its ability to adapt to new challenges and to maintain the support of its citizens.

梦想是照亮前路的灯塔。

The most important thing is to disturb the comfortable and comfort the disturbed.

理论的任务不仅是了解自然是什么以及它是如何运作的，而且要尽可能接近理解为什么自然是这样的而不是其他样子的不可达到的目标。