"I have always been interested in the nature of things, and especially in the nature of life."

"Anybody could see that quantum mechanics must lead to the tetrahedral carbon atom, because we have it. But the equations were so complicated that I never could be sure that I could present the argumen…"

"Like thousands of other boys, I had a little chemical laboratory in our cellar and think that some of our friends thought me a bit crazy."

"I realized that medical and biological investigators were not attacking their problems the same way that theoretical physicists do, the way I had been in the habit of doing."

"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."