如果我们认为可以将主动数据库系统中过程与数据的比率任意减小，甚至保持较小，那我们就是在开玩笑。
We kid ourselves if we think that the ratio of procedure to data in an active data-base system can be made arbitrarily small or even kept small.
Paths are made by walking.
Success is not final, failure is not fatal: it is the courage to continue that counts.
The mind is a dynamic system that constantly adapts to its environment.
The right of nature... is the liberty each man hath, to use his own power, as he will himself, for the preservation of his own nature; that is to say, of his own life.
We teach a subject not to produce little living libraries on that subject, but rather to get a student to think mathematically for himself.