"It is a remarkable fact that this substance, which is so potent against bacteria, is almost harmless to animal tissues."

"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…"

"A good gulp of hot whisky at bedtime—it's not very scientific, but it helps."

"The time may come when penicillin can be bought by anyone in the shops. Then there is the danger that the ignorant man may easily underdose himself and by exposing his microbes to non-lethal quantitie…"

"The greatest danger in the world is ignorance, and the greatest weapon is knowledge."