The decline of violence may be the most significant and least-appreciated development in the history of our species.

Sustainability is no longer an option; it's a necessity for survival.

Never be afraid to challenge the status quo. That's how progress is made.

The higher your energy level, the more efficient your body. The more efficient your body, the better you feel and the more you will use your talent to produce outstanding results.

乐观对于有意义的生活是无价的。坚信未来是积极的，你就可以投身于比你更伟大的事业中。

实现明天的唯一限制是我们今天的疑虑。

The past is always with us, for it feeds the present.

唯一能控制的是你的努力。

你的时间有限，所以不要浪费在过别人的生活上。

存在是一种风险，但不存在也是一种风险。