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。

The discovery of the accelerating expansion of the universe was a complete surprise.

Life is short, but there is always time for courtesy.

Sustainability isn't a choice—it's our responsibility to future generations.

自信不是"他们会喜欢我"，而是"他们不喜欢我也没关系"。

我们能做的最佳投资就是为后代的健康而努力。