"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?"

"I am only one of many who have contributed to the development of penicillin."

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

"I was just a dirty old man who left his dishes unwashed."

"It is the lone worker who makes the first advance in a subject; the details may be worked out by a team, but the prime idea is due to enterprise, thought, and perception of an individual."