What is the moral of the Loup et l'agneau?

Answer 1

'la raison du plus fort est toujours la meilleure'. No matter how flawed the rationale of the strongest [man, party, etc..], his view will always prevail. In simple terms, the strongest will always win, even though it is wrong.

Answer 2

"Apprenez que tout flatteur

Vit aux dépens de celui qui l'écoute :

Cette leçon vaut bien un fromage sans doute."

Learn that every flatterer

makes his living out of the one who listens to him:

to know that, is well worth a cheese.