One can only display complex information in the mind. Like seeing, movement or flow or alteration of view is more important than the static picture, no matter how lovely.

A LISP programmer knows the value of everything, but the cost of nothing.

There is no such thing as a free variable.

Learning French is trivial: the word for horse is cheval, and everything else follows in the same way.

When someone says, "I want a programming language in which I need only say what I want done," give him a lollipop.

It is better to have 100 functions operate on one data structure than to have 10 functions operate on 10 data structures.

Syntactic sugar causes cancer of the semicolon.