One Can't Proceed From The Informal To

You Think You Know When You Learn, Are More Sure When You Can Write, Even More When You Can Teach, But Certain When You Can Program.

A Lisp Programmer Knows The Value Of Everything, But The Cost Of Nothing.

A Picture Is Worth 10k Words - But Only Those To Describe The Picture. Hardly Any Sets Of 10k Words Can Be Adequately Described With Pictures.

There Is No Such Thing As A Free Variable.

When Someone Says, "i Want A Programming Language In Which I Need Only Say What I Want Done," Give Him A Lollipop.