I can relate to being motivated by that. I was too, at one point, but it's so unrealistic, and long run will destroy health. Also I don't think I could tell myself I would "NEVER EAT" some particular thing again - I'm so completely stubborn and rebellious that I'm sure the other side of me would say "Oh, Yeah? WATCH ME!" and then I'd be scarfing it down.
I have had a real struggle trying to learn long-term balance. I wish I knew what inspires that feeling of being satisfied with healthy choices and balanced living, and what can make it stick around. I've never been on the "eating disorder" side but I am a completely emotional eater.