The state of nature has a law of nature to govern it, which obliges every one: and reason, which is that law, teaches all mankind, who will but consult it, that being all equal and independent, no one ought to harm another in his life, health, liberty, or possessions.
The fact that there is nothing permanent except change is a permanent theme in nature.
数学中最激动人心的时刻是当你意识到两个看似不相关的领域有着深刻的联系时。