Or the moral, as it runs in the french:
    Mon bon Monsieur,
    Apprenez que tout flatteur
    Vit aux dépens de celui qui l'écoute :
    Cette leçon vaut bien un fromage, sans doute.
My clumsy translation: all flatterers live off of those who pay them heed.
In the version i learned it was cheese, not meat.