"No man — prince, peasant, pope, — has all the light, who says else is a mountebank. I claim no private lien on truth, only a liberty to seek it, prove it in debate, and to be wrong a thousand times to reach a single rightness. It is that liberty they fear. They want us to be driven to God like sheep, not running to him like lovers, shouting joy!"

“To make that long, last donkey-ride between the pikeman and the stake, to hear the shouting and the chant of hypocrites, to be a spectacle for animals in human masks!”

“I once asked a distinguished biologist to explain to me the genetic imprint, the famous double helix which differentiates one being from another. He called it "the graffito of God", because it can never be erased. All other imprints — of memory, environment, experience — he called "human graffiti.”

“Who said to me, a foetus in the womb, a puling babe, "You have your life, but on the condition that you thus believe?" No one! Not even God! So gentlemen, I say you have no right to make terms for my life. I tell you then — No! I will not recant.”

“Of all the animals in creation, politicians have the shortest memories.”

“I'm a Nolan. I could dazzle you in dialect, because the words do not make the same sense to different men.”

“There are a few of us — madmen all! — who are in love with knowing, who would sell the last shirt from our backs for one small truth, one tiny star-fire to light up the murk and mystery of what we call our life… We may go blind before we see it, that's the haunting —”