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.
In programming, as in everything else, to be in error is to be reborn.
A LISP programmer knows the value of everything, but the cost of nothing.
Often it is the means that justify the ends: goals advance technique and technique survives even when goal structures crumble.
Computer Science is embarrassed by the computer.
Every program has (at least) two purposes: the one for which it was written and another for which it wasn't.