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.

睡得早起得早，使人聪明、富有、身体好。

有时最深刻的数学来自于玩弄简单的想法，直到它们展现出隐藏的复杂性。

过去从未消逝，它甚至还未过去。

物理学家是一位探险家，他不满足于停留在已知世界的边界内。

艺术不是关于答案，而是关于问题。