古者以天下为主，君为客，凡君之所毕世而经营者，为天下也。
古代以天下为主体，君主为客体，君主一生所经营的，都是为了天下。
The greatest threat to our planet is the belief that someone else will save it.
如果你相信自己能做到，我认为没有什么是不现实的。
Profitability and environmental stewardship can—and must—go hand in hand.
The true spirit of delight, the exaltation, the sense of being more than Man, which is the touchstone of the highest excellence, is to be found in mathematics as surely as in poetry.
美好的生活是由爱所激发，由知识所指导的。
