I forget the actual quote, or who said it. Maybe someone can help me.

A missionary says to a young native boy, "Know Christ, or burn in Hell." The native asks, "Would I burn if I did not know Christ?" The missionary says, "No. Not if you did not know him."

"Then, why did you tell me?" asked the native boy.

"My best advice to anyone who wants to raise a happy, mentally healthy child is: Keep him or her as far away from the church as you can." -Frank Zappa

From The Devil's Dictionary, by Ambrose Bierce
Faith
n. Belief without evidence in what is told by one who speaks without knowledge, of things without parallel.

Don't you know there ain't no devil, it's just god when he's drunk.
—Tom Waits

“I like your Christ, I do not like your Christians. Your Christians are so unlike your Christ.” ~ Gandhi

"It's okay not to know all the answers. It's better to admit our ignorance than to believe answers that might be wrong. Pretending to know everything, closes the door to finding out what's really ther. "

NEIL deGRASSE TYSON

"You believe in a book that has talking animals, wizards, witches, demons, sticks turning into snakes, burning bushes, food falling from the sky, people walking on water, and all sorts of magical, absurd and primitive stories, and you say that we are the ones that need help?" –Mark Twain

“The God of the Old Testament is arguably the most unpleasant character in all fiction: jealous and proud of it; a petty, unjust, unforgiving control-freak; a vindictive, bloodthirsty ethnic cleanser; a misogynistic, homophobic, racist, infanticidal, genocidal, filicidal, pestilential, megalomaniacal, sadomasochistic, capriciously malevolent bully.”

? Richard Dawkins, The God Delusion

To me, this is the most profound atheism quote.

'Workers of the world, unite!
You have nothing to lose but your chains!'

K. Marx, F. Engels, The Communist Manifesto, 1848.

“The fanatical atheists are like slaves who are still feeling the weight of their chains which they have thrown off after hard struggle. They are creatures who – in their grudge against traditional religion as the ‘opium of the masses’ – cannot hear the music of the spheres.”

—Albert Einstein

"It's fair to say the Bible contains equal amounts of fact, history, and pizza." -Penn Jillette

Something Abraham Lincoln heard:

When I do good I feel good, when I do bad I feel bad. That is my religion.

"Religion poisons everything"

• Christopher Hitchens

The only angels we need invoke are those of our better nature: reason, honesty, and love. The only demons we must fear are those that lurk inside every human mind: ignorance, hatred, greed, and faith, which is surely the devil's masterpiece.--Sam Harris, The End of Faith

Carl Sagan: "" You can't convince a believer of anything; for their belief is not based on evidence, it's based on a deep-seated need to believe.""

“I have concluded that we are in a world made by rules created by an intelligence. Believe me, everything that we call chance today won’t make sense anymore. To me it is clear that we exist in a plan which is governed by rules that were created, shaped by a universal intelligence and not by chance.”

–Michio Kaku, theoretical physicist and string theory pioneer.

“It may seem bizarre, but in my opinion science offers a surer path to God than religion.”

“People take it for granted that the physical world is both ordered and intelligible. The underlying order in nature-the laws of physics-are simply accepted as given, as brute facts. Nobody asks where they came from; at least they do not do so in polite company. However, even the most atheistic scientist accepts as an act of faith that the universe is not absurd, that there is a rational basis to physical existence manifested as law-like order in nature that is at least partly comprehensible to us. So science can proceed only if the scientist adopts an essentially theological worldview.”

–Physicist Paul Davies, the winner of the 2001 Kelvin Medal issued by the Institute of Physics and the winner of the 2002 Faraday Prize issued by the Royal Society (amongst other awards), as cited in his book God and the New Physics (first quote), and from his acceptance address of the 1995 Templeton Prize (second quote).

"I shall regard all phenomena as the particular dealing of God with my soul."
~Jack Parsons

Religion is big businese

"Religion is for people who are afraid of going to hell. Spirituality is for people who have already been there."

"Don't tell me what you believe, show me the physical evidence" Carl Sagan on his death bed to a preacher that thought he needed saving.

"Perception is reality" -- Albert Einstein