"I'd say there are four. First, a person isn't always able to find every dish he wants on the menu. Second, he can nonetheless usually find enough of a variety to satisfy both his hunger and his palate. Third, while eating he should obey the old maxim and never bite off more than he can chew. Fourth, this, however, should not prevent him from taking healthy mouthfuls - for any food worth eating should be eaten, not toyed with or nibbled in a finicky fashion."
-J. Paul Getty