The first responsibility of the Muslim is as teacher. That is his job to teach. His first school his first classroom is within the household. His first student is himself. He masters himself and then he begins to convey the knowledge that he has acquired to the family. The people who are closest to him.
When my dad was badly weakened by the flu and my mom wanted to call an ambulance to take him to the emergency room he wouldn't go unless he could shave first and change into a nice shirt and a pair of slacks.