"I will not attack your doctrines nor your creeds if they accord liberty to me. If they hold thought to be dangerous - if they aver that doubt is a crime, then I attack them one and all, because they enslave the minds of men."

— Robert Green Ingersoll

"Man is a credulous animal, and must believe something; in the absence of good grounds for belief, he will be satisfied with bad ones."

— Bertrand Russell, Unpopular Essays (1950), “Outline of Intellectual Rubbish” (via QuotationsPage.com)

"What the world needs is not dogma but an attitude of scientific inquiry combined with a belief that the torture of millions is not desirable, whether inflicted by Stalin or by a Deity imagined in the likeness of the believer."

— Bertrand Russell

"Well played. Religion just killed another person."

— Dr. Gregory House on the religious denial of organ donation after a next of kin sabotaged the viability of the organ.