我们不是从祖先那里继承了地球；我们是从子孙那里借来的。
We don't inherit the earth from our ancestors; we borrow it from our children.
Sustainability is not just about materials but about sustaining people's lives and dignity.
I don’t run out of material. I run out of time.
我在你们这个年龄，最害怕的不是贫穷，而是失败。
"The only way to deal with an unfree world is to become so absolutely free that your very existence is an act of rebellion."
唯一不变的是变化，持续的变化，不可避免的变化，这是当今社会的主导因素。
所以，国家的钱财不足以来应付饥荒，救济孤儿寡妇，这样，国家就贫困，百姓就难于治理。