J'ai rien compris aider moi s'il vous plaît je vous remercie cordialement

For me. I am a student .I spend a difficult stage.is called "Teen".
actually,teen does not lie in the physical changes,But lies in the mentality of the person. In his thinking.When I was fifteen years old.I'm gonna act recklessly.
Thank god.I become a people quiet,calm. After he was reckless people.It happened after my conversion to Islam.Because Islam a religion train and control the morals and mind.