I don't read BrainBasedBusiness enough but every so often, I notice a post on there that seems to fit a situation such as How You Communicate is Who You Become where the idea is whatever you express, with enough repetition, becomes the way your brain is wired to behave (actually, sounds like common sense).

"…Fortunately, communication can also wire the brain for prosperity. You can move your brain into a better place … simply  by communicating today … who you’d like to become tomorrow. Use tools such as good tone, for instance, and expect more good tone to lead you to a better place in the next day or so. The brain is shaped by your world and by responses you make to that world. "

I guess that would support a few observations, through personal experience, that 1) dwelling on failures intensifies them and 2) therapies that require you "feel your feelings" perhaps with the goal of owning them, are incomplete unless you can also find a way to change the feelings.  

What Dr. Ellen Weber writes in How You Communicate is Who You Become could be a way to do that - though I'm not sure what the parameters or metrics for that are (when can one do it on their own vs. needing help)?