All the labour of man is for his mouth, and yet the appetite is not filled (Ecc. 6:7).
When you sit to eat with a ruler, consider diligently what is before you, and put a knife to your throat if you be a man given to appetite. Be not desirous of his dainties: for they are deceitful meat (Pro 23:1-3).
L’appetit vient en mangeant – Appetite comes with eating (Francois Rabelais). But do not dig your grave with your teeth.