Society can and does execute its own mandates， and if it issues wrong mandates instead of right， or any mandates at all in things with which it ought not to meddle， it practices a social tyranny more formidable than many kinds of political oppression， since， though not usually upheld by such extreme penalties， it leaves fewer means of escape， penetrating much more deeply into the details of life， and enslaving the soul itself.

穷人不是需要解决的问题，而是需要拥抱的机会。

文字的力量在于它们可以改变世界。

海洋不仅仅是一种资源；它是一种责任。我们今天如何对待它，将决定我们为后代留下的遗产。

两个物体的相互作用力总是大小相等，方向相反，同时出现或消失且作用于同一直线上。