Réponse:
You are an adult when you realize that arguing is not always the solution to problems
You are an adult when you find a person you consider more valuable than gems
You are an adult when you have responsibilities, rent payments or other damn taxes
You are an adult when when you come home from the evening a little tipsy you take the taxi
Finally, you are an adult when it's no longer your parents who take care of you, but you of your parents
And this is one of the most important moral contents