A short, finished list rather than an endless feed: 100 of the best diet quotes ever written, picked out of the full diet archive on QuoteForever. You will find Robert Atkins, Holly Madison, Joel Fuhrman and Kathy Freston among them.
Read the list top to bottom, or use it as a starting point - every author name links to everything else they said, and every quote has its own page you can share or turn into an image.
If I like myself at this weight, then this is what I'm going to be. I don't have an eating disorder.
I don't need a diet pill. I need something that gives you an electric shock when you reach for food.
Most diets would have you cutting things out from your diet; they are about denial and discipline.