"Every man of science has some favorite hypothesis which he cultivates, and with which he is so intimately bound up, that he would be glad to see it universally adopted."

"The best way to have a good idea is to have a lot of ideas."

"I don't think there's anything wrong with taking a lot of vitamin C."

"Do not let your special talents in chemistry, your love for chemistry, keep you from developing your talents in other fields. Do not let yourself be a narrow specialist."

"I like people. I like animals, too—whales and quail, dinosaurs and dodos. But I like human beings especially, and I am unhappy that the pool of human germ plasm, which determines the nature of the hum…"