Extra features were once considered desirable. We now recognize that 'free' features are rarely free. Any increase in generality that does not contribute to reliability, modularity, maintainability, and robustness should be suspected.

Testing proves a programmer’s failure. Debugging is the programmer’s vindication.

Second law: The complexity barrier. Software complexity (and therefore that of bugs) grows to the limits of our ability to manage that complexity.

Software never was perfect and won't get perfect. But is that a license to create garbage? The missing ingredient is our reluctance to quantify quality.

More than the act of testing, the act of designing tests is one of the best bug preventers known.

If you can't test it, don't build it. If you don't test it, rip it out.

A good threat is worth a thousand tests.