心灵是生物的问题解决装置。

政府下的人的自由是拥有一个普遍适用的常规生活准则，而不受另一个人的多变、不确定和武断意愿的支配。

"The connection between mathematics and computer science is not just a one-way street; each field enriches the other."

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.

The best picture books work on different levels for different ages.

"الحب ليس أن تجد الشخص المثالي، بل أن ترى الشخص غير المثالي بطريقة مثالية."

"A good cinematographer knows when to break the rules."