„People also underestimate the time they spend debugging. They underestimate how much time they can spend chasing a long bug. With testing, I know straight away when I added a bug. That lets me fix the bug immediately, before it can crawl off and hide. There are few things more frustrating or time wasting than debugging. Wouldn't it be a hell of a lot quicker if we just didn't create the bugs in the first place?“
— Martin Fowler
Martin Fowler (2002) as cited in Evolutionary Design: A Conversation with Martin Fowler, Part III by Bill Venners, November 18, 2002.