景观的历史写在它的土壤、植被和地形中。

只凭一句赞美的话我就可以充实地活上两个月。

A leader's job is to create more leaders, not more followers.

We have a responsibility, every one of us. We may think we live a long way from the oceans, but we don't. What we actually do here, has a direct effect on the oceans—and what the oceans do then reflects back on us.

历史学家必须是诗人，不是为了创造，而是为了重新创造。

数学不仅仅是关于数字、方程、计算或算法：它是关于理解的。