The best way to understand something is to try to change it.

The present state of the system of nature is evidently a consequence of what it was in the preceding moment, and if we conceive of an intelligence which at a given instant comprehends all the relations of the entities of this universe, it could state the respective positions, motions, and general effects of all these entities at any time in the past or future.

大自然从未背叛过爱她的心。

有两种自由——一种虚伪的自由，一个人可以为所欲为；一种真正的自由，一个人可以为所应为。

可能世界是被规定的，而不是通过强大的望远镜发现的。

Courage doesn’t mean you don’t get afraid. Courage means you don’t let fear stop you.