I'm an intelligent person, why can't I stop this destructive behavior????
I used to wonder that ALL the time.
I think in part, it's that motivation just is not enough. You have to be willing and able to make a commitment. You might not have to have a plan fully in place or 100% believe it would work (I didn't have either), but you do have to believe you CAN do it. That was my problem for years and years.
I don't know about you, but I found other ways to build my self-worth and told myself it was okay if I kind of sucked in the physical realm. I saw it as a foregone conclusion that I would be an obese person the rest of my life.
In the end, I'm really glad I didn't listen to me! That part of me anyway. My life is a lot more complicated, but also more complete and complex... hmmm, I'm on a "compl" kick...