How can you feel 'wretched' and good at the same time?

How can the apostle Paul call himself a "wretched man" -- overcome by sin; yet also see himself as a new creation, claiming that he's really not "controlled by the sinful nature but by the Spirit?"  Which is it, Paul?

Doesn't he seem to be forgetting his own God-given goodness, his new and noble nature, when he calls himself "wretched?" 

John Lynch, co-author of True Faced and Bo's Cafe, has a fresh and more helpful way of looking at "wretchedness:" 

“Wretched”:  Miserable, because of the pain in my regenerate heart of wanting to do what’s right but overcome with my [natural] inability to pull it off.  Only the regenerate mind can grieve over unrighteousness. 

This kind of wretchedness doesn't dismiss the radically-pure nature God has given us: 

Rather, it means, “Wretched through the exertion of hard labor.”  In other words, "I’m so tired of trying to make this work!”

It's the wretchedness of a man who has exhausted himself by trying to live a super-natural life with grossly inadequate, depleted natural reserves:  a man trying to live apart from his new heart and the Spirit's work there.