From page 417 of The Big Book of Alcoholics Anonymous:
And acceptance is the answer to all my problems today. When I am disturbed, it is because I find some person, place, thing, or situation—some fact of my life —unacceptable to me, and I can find no serenity until I accept that person, place, thing, or situation as being exactly the way it is supposed to be at this moment. Nothing, absolutely nothing, happens in God’s world by mistake. Until I could accept my alcoholism, I could not stay sober; unless I accept life completely on life’s terms, I cannot be happy. I need to concentrate not so much on what needs to be changed in the world as on what needs to be changed in me and in my attitudes.
Shakespeare said, “All the world’s a stage, and all the men and women merely players.” He forgot to mention that I was the chief critic. I was always able to see the flaw in every person, every situation. And I was always glad to point it out, because I knew you wanted perfection, just as I did. A.A. and acceptance have taught me that there is a bit of good in the worst of us and a bit of bad in the best of us; that we are all children of God and we each have a right to be here. When I complain about me or about you, I am complaining about God’s handiwork. I am saying that I know better than God.