The beggar/sorcerer is a very cunny man and he has now managed to convince Bernèz to go treasure hunting with him but he didn't tell him the whole truth, it's a death trap for Bernèz but being so desperate to get riches so as to be able to marry Rozennik, he's not thinking straight. Of course he would get wealth but at what price?. We read on to know what actually happened.
Yes, you are on the right path, visiting a doctor at least once a year for a medical checkup is apt.