The rabbit learns that stealing is wrong and only results in bad consequences.
Step-by-step explanation:
Bruh Rabbit steals from the others and gets a sword for himself that he is proud of.
In the end however he is able to see how much the cost of the sword has been to him for being able to steal it and then trying to get away with the stealing of the item.
He would think he was better off buying it from somewhere than actually stealing it.
This makes him realize that it never is good to steal and one must always be honest in these things.