A well-managed forest is a gift that keeps giving.

The great secret that all old people share is that you really haven't changed in seventy or eighty years. Your body changes, but you don't change at all. And that, of course, causes great confusion.

The key to progress is persistence and a willingness to challenge conventional wisdom.

Never underestimate the power of a single idea to transform the world.

永远不要让失败定义你，而是让它教会你。

The best stories come from the heart.

成功不仅仅以利润衡量，而是以我们对社会的积极影响来衡量。

——〈在北京湖广会馆学界欢迎会的演说〉，1912年8月30日

在代数中，两个量的相等性通过方程来表达。

在表达创伤时，沉默可能比言语更有力量。