Intelligence

"You put too much stock in human intelligence."

"There is nothing worse than aggressive stupidity."

"There are in fact two things, science and opinion; the former begets knowledge, the latter ignorance."

"I believe that a scientist looking at nonscientific problems is just as dumb as the next guy."

"Immaturity is the incapacity to use one's intelligence without the guidance of another."

"The test of a first-rate intelligence is the ability to hold two opposed ideas in mind at the same time and still retain the ability to function."

"The problem with the world is that the intelligent people are full of doubts, while the stupid ones are full of confidence."

"Nothing is so necessary for a young man as the company of intelligent women."

"The day science begins to study non-physical phenomena, it will make more progress in one decade than in all the previous centuries of its existence."

"The scientists of today think deeply instead of clearly. One must be sane to think clearly, but one can think deeply and be quite insane."

"People who boast about their IQ are losers."

"We are just an advanced breed of monkeys on a minor planet of a very average star. But we can understand the Universe. That makes us something very special."

"The brain is wider than the sky."

"Intelligence is based on how efficient a species became at doing the things they need to survive."

"Ignorance more frequently begets confidence than does knowledge."

"People who think they know everything are a great annoyance to those of us who do."

"If you can't explain it simply, you don't understand it well enough."