> Most of the great programmers who inspire me don't write tests but have the deepest understanding of whats going on. Understanding the code and having tests

> Most of the great programmers who inspire me don't write tests but have the deepest understanding of whats going on. Understanding the code and having tests is not mutually exclusive. And if you have ever inherit a code base from somebody who "didn't need to write tests", because he or she understood the code so well, you will come to appreciate tests in a whole new way. ;-)