Who can always hit the nail on the head

“Gentlemen! I begin today’s lecture on human illnesses.”
“If a person is sick, then Nature and illness are at odds with each other. The physician comes in and hits it with a club: if he hits the illness, then the person becomes healthy; but if he hits Nature, then the sick person dies.”
(Fliegende Blätter, Munich, 1847) (A British print in a similar vein.)