Freedom does not consist in any dreamt-of independence from natural laws, but in the knowledge of these laws, and in the possibility this gives of systematically making them work towards definite ends.

可持续性不仅仅是一个目标，更是我们对后代的责任。

The best reactions are those that work the first time and every time.

当爱成为命令时，恨就能成为快乐。