“Children are remarkable for their intelligence and ardor, for their curiosity, their intolerance of shams, the clarity and ruthlessness of their vision.”

“Cynical realism—it's the intelligent man's best excuse for doing nothing in an intolerable situation”

“which is better - to be born stupid into an intelligent society or intelligent into an insane one?”

“Man is an intelligence, not served by, but in servitude to his organs.”

“Man is so intelligent that he feels impelled to invent theories to account for what happens in the world. Unfortunately, he is not quite intelligent enough, in most cases, to find correct explanations. So that when he acts on his theories, he behaves very often like a lunatic.”

“For in spite of language, in spite of intelligence and intuition and sympathy, one can never really communicate anything to anybody.”

“We shall be permitted to live on this planet only for as long as we treat all nature with compassion and intelligence.”