You can restore your physical being to health; you can develop a rational, balanced, caring attitude to weight as well as good daily habits. But you can't forget how many calories are in a boiled egg or how many steps burn how many calories. You can't forget what exact weight you were every week of every month that made up that sometimes, on very difficult days, it feels like you'll never be as euphoric as that ten-year-old licking lurid jam off her fingertips, not ever again.