Quote by Paul Ehrlich
"A person who makes no mistakes has tried nothing new."
"A person who makes no mistakes has tried nothing new."
"The microbe is so much smaller than ourselves that we can easily forget the fact that it stalks us all the time, waiting, and watching for the moment when we lay down our defense."
"In science there are no shortcuts to truth."
"The side-chain theory explains the formation of antibodies."
"Medicine is a science of uncertainty and an art of probability."