Life would be too smooth if it had no rubs in it.

Learning makes wise, but does not make happy.

世界需要能源，但它比以往任何时候都更需要负责任的能源。

Ask not what your country can do for you --ask what you can do for your country.

Light is what makes architecture alive.

Profit and sustainability are not mutually exclusive; they must go hand in hand.

我们不是从祖先那里继承土地；我们是从子孙那里借来的。