I like the night. Without the dark, we'd never see the stars.

Collaboration is the key to solving the world's most pressing problems.

Freedom is not a gift but an achievement that must be won every day.

The world needs energy, but it needs responsible energy more than ever.

牛马生着四足，这是天性；给马戴上笼头，给牛穿上鼻绳，就是人为。所以说，不要人为毁灭天性，不要用故意造作去毁灭天命，不要以德行去为名利殉葬，谨守天道勿使丧失，这就叫返归本真。