"Put a Knife to Your Throat"
The Bible puts it a slightly different way: "Put a knife to your throat if you are a man given to appetite" (Proverbs 23:2). This principle can be applied to many situations, not only eating. Overstaying a visit can cause invitations to become scarce.
Overeating is something that is more obvious than most problems we have. The young of many nations are battling a huge problem that has to do with appetite. There is a great interference in our quality of life when we lack self-control in anything.