"It is not difficult to make microbes resistant to penicillin in the laboratory by exposing them to concentrations not sufficient to kill them, and the same thing has occasionally happened in the body."

"I have been working for many years on the problem of finding substances which would destroy microbes in the body without injuring the cells of the body."

"When I woke up just after dawn on September 28, 1928, I certainly didn't plan to revolutionize all medicine by discovering the world's first antibiotic, or bacteria killer. But I suppose that was exac…"

"The public looks for miracles. We scientists look for facts."

"If penicillin can cure those that are ill, Spanish sherry can bring the dead back to life."