For motivation, I think when we gain weight, it's like wearing a dress that's too large for a while. We may not like the look of it and we'd rather not wear it, but we can change the color and pattern. Then with perseverance and work, the dress gets smaller, inch by inch.
But that dress isn't really who we are inside, just the outer layer. We are all worthy of respect, love and encouragement, no matter how large it is, how long we wear it, or what it's made of, plain cotton or fine satin.