最有力的艺术是不试图有力的艺术。

伽罗瓦表示的研究证明了代数几何之美。

My stomach is a knot of sorrow and anger, but I keep smiling.

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.

创造性力量很容易变成破坏性力量。这只取决于人们的道德人格：是用此力量做好事或做坏事。如果人们缺乏这种道德人格，则没有一种说教能够提供它或取而代之。

系统有子系统，子系统有子系统，等等，这是无限的，这就是为什么我们总是从头开始。