The man who writes about himself and his own time is the only man who writes about all people and about all time.

Leadership is about inspiring others to see what they can become.

如果你不相信自己，就没有人会相信你。

文明的分布并非偶然，而是遵循与气候条件密切相关的明确规律。

The best solutions often come from listening—to nature, to science, and to the people on the ground.