I'll start with... "I need not the promise of Heaven to see merit in good deeds".
And... "Adults with imaginary friends are dumb!".
"What can be asserted without evidence can be dismissed without evidence." - Christopher Hitchens.
"Extraordinary claims require extraordinary evidence" - Carl Sagan
"With or without religion, you would have good people doing good things and evil people doing evil things. But for good people to do evil things, that takes religion." Steven Weinberg
If you want to sin and be a inmoral and be a career criminal just become a Christian and you can sin all you want and you will be forgiven and reap the rewards of heaven, however if you're a good decent honest hard-working human being who dedicated your life to helping others but yet you don't believe in a deity you're going to suffer for all eternity in the depths of hell, makes me wonder.
I don't think it is necessarily a quote as much as a personal belief. If "God" loves all unconditionally, then why must he threaten eternal damnation for disobedience and disbelief? I'd never condemn a child of mine for what they feel, or believe.
I might be paraphrasing a little:
“There’s not enough love in the world as it is without wasting some on imaginary beings” - Nietzsche
And another of my favs:
I shall be after death precisely what I was before conception, namely, Nothing and Unaware.
Hence, all those who claim to be saved will never know that they weren't "
Author Unknown
"Nothing fails like prayer."
Annie Laurie Gaylor - FFRF
Pretty much any snarky comment Ricky Gervais has ever made on the subject. Sure Richard Dawkins, Michael Schermer, and Christopher Hitchens are wonderful at esoteric postulations for why there is no evidence of any sort of supreme being, but with Ricky Gervais, it's more like a fresh slap in the face and an admonition to not be so stupid.
"You'll never find a dead Christian in a fox hole that didn't pray. " Darrell Barker
“My dad doesn’t know what he is talking about”
-Robin Baker
God is the sound people make when they're too tired to think anymore. ~Edward Abbey