That is a Hebrew proverb, and it has to do with a lot
more than food. Look to see what behaviors you are
indulging in over and over again that are clearly not
serving you. Then, go on a “bad habit diet.”
I mean it.

I’m not kidding, Pick one bad habit, one
bad behavior a day for five days. You can do this.
Stop doing the stuff you’re doing that obviously
does not serve you–or others.
This friendly “nudge” came from your Self, you know…

Neale Donald Walsch