Alexander Fleming — "It is the common lot of discoverers to be misunderstood."

"A good many people think that I deserve some credit for the discovery of penicillin. They are wrong. It was discovered by nature."

"I am not a very good speaker, but I hope my work speaks for itself."

"I found penicillin and have given it free for the benefit of humanity. Why should it become a profit-making monopoly of manufacturers in another country?"

"It is not the discovery of a new substance that is important, but the recognition of its properties."

"The therapeutic value of penicillin is enormous, but its indiscriminate use could lead to disaster."