“Being a mother is an attitude, not a biological relation.”

“History has the relation to truth that theology has to religion — ie., none to speak of”

“Citizenship is an attitude, a state of mind, an emotional conviction that the whole is greater than the part...and that the part should be humbly proud to sacrifice itself that the whole may live.”

“Horace was a nice little guy who looked like one of his own baboons; he turned me over to a Doctor Vargas who was a specialist in exotic biologies--the same Vargas who was on the Second Venus Expedition. He told me what had happened and I looked at the gibbons, meantime rearranging my prejudices.”

“Being right too soon is socially unacceptable.”

“That’s a subject as safe as being in favor of Christmas.”

“Seems to be a deep instinct in human beings for making everything compulsory that isn't forbidden.”