I originally went to college for a technical communications degree, and IT was my fallback. I still consider writing to be my primary vocation, but IT has turned out to be where the money is.
Anyway, one of the main things I learned from my writing classes is that when it comes to editing, Rule #1 is "Love is far-sighted." That means that if you really want to make sure that what you've written is good, you need to either have someone else take a look at it or distance yourself from it by setting it aside for a day or two and then
checking it yourself.
Rule #2 is that writing and editing are not identical skill sets (although they do have much in common). Someone who's a good writer might not necessarily be a good editor, and vice versa.
Phil's post shows that the same two principles hold true in the IT realm, particularly where programming and testing are concerned. I just thought it was cool that his message ties in so nicely with writing and editing. Neat post!