The most important property of a program is whether it accomplishes the intention of its user.

The real opposition is that between the ego-bound man, whose existence is structured by the principle of having, and the free man, whose existence is structured by the principle of being.

耐心是苦的，但它的果实是甜的。

记忆是一件复杂的事情，是真理的亲戚，但不是它的双胞胎。