“The only thing that will redeem mankind is cooperation.”

“I consider the official Catholic attitude on divorce, birth control, and censorship exceedingly dangerous to mankind.”

“It is possible that mankind is on the threshold of a golden age; but, if so,it will be necessary first to slay the dragon that gaurds the door,and this dragon is religion”

“Curious learning not only makes unpleasant things less unpleasant but also makes pleasant things more pleasant.”

“Three passions, simple but overwhelmingly strong have governed my life: the longing for love, the search for knowledge, and unbearable pity for the suffering of mankind.”

“The fact that an opinion has been widely held is no evidence whatever that it is not utterly absurd; indeed in view of the silliness of the majority of mankind, a widely spread belief is more likely to be foolish than sensible.”

“We do not like to be robbed of an enemy; we want someone to hate when we suffer. It is so depressing to think that we suffer because we are fools; yet, taking mankind in the mass, that is the truth.”