I want to add that, IMO, not all moods are necessarily rooted in a wound. When I talk about being able to trace a mood back to my past, I'm referring to those really dark moods that you can't shake off and eventually start to feel like inescapable quicksand. I still think that some people are wired that way - ultra sensitive to everything around them - and that our moods (we could call it "introverting ourselves") may be our way of processing and internalizing it all.
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When you don't like a thing, change it.
If you can't change it, change the way you think about it.

(Maya Angelou)