Every Program Has (at Least) Two Purposes:

The Best Book On Programming For The Layman Is Alice In Wonderland, But That's Because It's The Best Book On Anything For The Layman.

If You Have A Procedure With 10 Parameters, You Probably Missed Some.

One Can't Proceed From The Informal To The Formal By Formal Means.

Don't Have Good Ideas If You Aren't Willing To Be Responsible For Them.

In Computing, Turning The Obvious Into The Useful Is A Living Definition Of The Word "frustration".