Our meals should always be moderate. All the saints, who customarily watched strictly after themselves, say with one voice: 1) that very little is needed for satisfaction of our bodies; 2) that our bellies by themselves almost never know moderation; 3) that our bellies sometimes demand food even when they have had more than enough, and 4) that therefore to maintain moderation it is best to cease consumption of food when the urge to eat has still not completely subsided.

—Metropolitan Gregory of St. Petersburg (1784-1860), How Should We Conduct Ourselves During Meals?