Primum non nocerum. (First do no harm)
Prayer indeed is good, but while calling on the gods a man should himself lend a hand.
Whenever a doctor cannot do good, he must be kept from doing harm.
The physician must have at his command a certain ready wit, as dourness is repulsive both to the healthy and the sick.
Where there is love of medicine, there is love of humankind.
Health is the greatest of human blessings.