In general, we can think of data as defined by some collection of selectors and constructors, together with specified conditions that these procedures must fulfill in order to be a valid representation. -- SICP, What is meant by data?

The only way of discovering the limits of the possible is to venture a little way past them into the impossible. -- Arthur C. Clarke

Lisp is a programmable programming language. -- John Foderaro

Sometimes a man with too broad a perspective reveals himself as having no real perspective at all. A man who tries too hard to see every side may be a man who is trying to avoid choosing any side. A man who tries too hard to seek a deeper truth may be trying to hide from the truth he already knows. That is not a sign of intellectual sophistication and "great thinking". It is a demonstration of moral degeneracy and cowardice. -- Steven Den Beste

When all you have is a hammer, everything looks like a nail. -- unknown

I guess, when you're drunk, every woman looks beautiful and every language looks (like) a Lisp :) -- Lament, #[email protected]

To live a creative life, we must lose our fear of being wrong. ~Anonymous

Nothing is impossible, the word itself says, “I’m possible!” –Audrey Hepburn

I find that when you have a real interest in life and a curious life, that sleep is not the most important thing. ~Martha Stewart

You take your life in your own hands, and what happens? A terrible thing, no one to blame. –Erica Jong