One Man's Constant Is Another Man's Variable.

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.

When A Professor Insists Computer Science Is X But Not Y, Have Compassion For His Graduate Students.

Every Program Has (at Least) Two Purposes: The One For Which It Was Written And Another For Which It Wasn't.

To Understand A Program, You Must Become Both The Machine And The Program.

Adapting Old Programs To Fit New Machines Usually Means Adapting New Machines To Behave Like Old Ones.