"I have often thought that if there is any hell, it must be the place where there are no questions, only answers."

"I think that when you're doing science, you're trying to find out something that nobody knows."

"The only way to do great work is to love what you do."

"You can know the name of a bird in all the languages of the world, but when you're finished, you'll know absolutely nothing whatever about the bird. You'll only know about humans in different places a…"

"I'm not a humanitarian. I'm a scientist."