The laws of behavior can be derived from basic physiological principles.

The more we love our friends， the less we flatter them； it is by excusing nothing that pure love shows itself.

The future belongs to those who understand that doing more with less is compassionate, prosperous, and enduring.

追求科学不仅仅是追求理解。它是追求一种来自知道我们不知道多少的智慧。

译文：对上顺应天意，对下满足百姓期待，这样才能建功立业、长保平安。

摆脱诱惑的唯一方式就是屈服于它。

这句话其实是莎士比亚借哈姆雷特之口说的，但是霍金非常喜欢，曾在自己著作中多次引用，所以很多人误以为本句话是霍金说的。