It's not what we see, it's what we perceive that's important. If I choose to see the tree bark as being a beautiful sculpture created by a loving eternal power beyond human explanation, I can find a peaceful, hopeful feeling. If I choose to see the same tree bark as a manifestation of an apparently unending winter of dull, colorless gloom, I can find a nihilistic nightmare.
I don't want to relapse into negative thinking. I don't want to act out in a way that is symptomatic of my depression or addiction. So long as I follow my treatment plan, I can choose to see life is good. If I relapse, which begins with a regression in following my treatment plan, I lose the choice of a happy perception.
Right now I'm going to open the window which makes me see life is good.