如果你仔细观察，平凡的事物也会变得非凡。
不沉溺于过去，专注未来。
儿童是人类的创造者。
在糟糕的时候抱有希望不仅仅是愚蠢的浪漫。这是基于人类历史不仅是残酷的历史，也是同情、牺牲、勇气和善良的历史。
采石业的创新不仅在于新技术，更在于新思维。
You can't change what you are, only what you do.
Those who deny freedom to others, deserve it not for themselves; and, under a just God, can not long retain it.
The tyranny of a prince in an oligarchy is not so dangerous to the public welfare as the apathy of a citizen in a democracy.