Linus Pauling — "The human body can make a number of substances, but it cannot make vitamin C."

"The only thing that stands between a man and what he wants from life is often merely the will to try it and the faith to believe that it is possible."

"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."

"The most important thing for a scientist is to be curious."

"Every time you go to the doctor, the doctor asks you to take off your clothes, and then he looks at you, and he tells you what's wrong with you. But he doesn't know anything about you."

"I have always liked working in some directions that people say, 'Well, that's ridiculous.'"