He turned to medicine at 16, and not only learned medical theory, but also by gratuitous attendance of the sick had, according to his own account, discovered new methods of treatment.
16-aastaselt hakkas ta õppima meditsiini ning mitte ainult teooriat, vaid patsientide tasuta hooldamise käigus avastas ta enda sõnul ka uusi ravimeetodeid.