To have something in moderation is defined as: within reasonable limits and never to excess.
In today’s society most food is served in super sized portions. It is not unusual when buying a slice of pie to be served an enormous 3 serving size slice. People actually get upset when they are served a normal portion; they think they are being cheated.
Consider this, a normal portion size of meat should be 2-3oz/per meal. The visual of that would be the size of the palm of your hand or a deck of cards.
Proverbs 23:2 declares, And put a knife to thy throat, if thou be a man given to appetite.
The next time you are tempted to eat that 3rd serving of pie, consider practicing a little moderation or temperance.