可持续性不是一种趋势，而是我们对后代的责任。

信心不是乐观或悲观，也不是性格属性。它是对积极结果的期待。

You’ve got to have models in your head. And you’ve got to array your experience—both vicarious and direct—on this latticework of models. You may have noticed students who just try to remember and pound back what is remembered. Well, they fail in school and in life. You’ve got to hang experience on a latticework of models in your mind.

The only real voyage of discovery consists not in seeking new landscapes, but in having new eyes.

具有坚定意志并能付诸实践的人，才是君子。