"The story of penicillin has a certain romantic appeal, and I think that may be one of the reasons it has attracted so much attention. But the real story is much more prosaic."

"It is not enough to discover a thing; one must also know how to use it."

"The future of chemotherapy lies in the intelligent use of these new antibacterial agents."

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

"It is a popular misconception that I was a brilliant chemist, but I was not. I was a bacteriologist."