Many corporate programmers never get beyond looking at the source code as their basis of understanding business functions and how programs work. These programmers are, I believe, doomed never to understand vast amounts of important business functions or program code, because it is difficult to learn that way. They can't see the business function because when they are looking at the details in the code, they are looking at details that are rarely, if ever, executed. These programmers typically spend their programming careers bored and unhappy because they are focused on support of a tiny part of the corporate business function.