"I have never been afraid to be wrong."

"Never put your trust into anything but your own intellect. Your elder, no matter whether he has gray hair or has lost his hair, no matter whether he is a Nobel laureate — may be wrong. The world progr…"

"Just one living cell in the human body is, more complex than New York City."

"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 am not afraid of death. I am afraid of not living."