Richard Feynman — "Science is the belief in the ignorance of experts."

"It's a great thing to be able to say, 'I don't know.'"

"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…"

"By the way, Professor, you know that paper in which you say those quantities are analogous... Did you know they're proportional?"

"There is no such thing as a miracle. There is only what we don't understand yet."

"The easiest way to fool yourself is to believe something because you want it to be true."