I think of acceptance as part of something rather than in isolation or as a 'complete' end goal.
I believe life is like a game of cards - some parts dealt but we hold the decision what we do with those cards. To me acceptance is to know that life is fluid and holds surprises but we keep control over how we live it. My sense of my life is my sense of my learning, my own mistakes teach me tolerance, hurt teaches me compassion, fear teaches me understanding. Acceptance is knowing that hard things as well as easy ones will cross my path.
Like Forest Gump said:
"Life is like a box f chocolates - you never know what you will get."
But hopefully over time I learn to chose more wisely and be more accepting of the occassional strawberry cream (yeah - right, not this decade!!).