你必须花费一些精力和努力才能看到数学的美。

Art is not what you see, but what you make others see.

Taught from infancy that beauty is woman's sceptre, the mind shapes itself to the body, and roaming round its gilt cage, only seeks to adorn its prison.

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.

最好的想法往往在你最意想不到的时候出现。