I have listed Below around 30 of my favorite famous quotes that i hope will help sober up the religious mind towards atheism, probably wishful thinking though.
"The predisposition to religious belief is an ineradicable part of human behavior. Mankind has produced 100,000 religions. It is an illusion to think that scientific humanism and learning will dispel religious belief. Men would rather believe than know..." E.O Wilson
"If there is a God, atheism must seem to Him as less of an insult than religion." Edmond de Goncourt
"people don't like the true and simple; they like fairy tales and hum bug." Edmond de Goncourt
"All personal gods are idolatrous... The great service to humanity of science has been to sweep the anthropomorphic gods away, or, at the very least, to show them for what they are, phantoms of the human brain." W.V.O. Quine
"Religion is a system of instruction by precepts, which have like all moral rules, an exterior sanction remote from reality and daily life; it does not fortify the character, but on the contrary, enfeebles it." Lombroso
"If we are honest-and scientists have to be-we must admit that religion is a jumble of false assertions, with no basis in reality. The very idea of God is a product of the human imagination. It is quite understandable why primitive people, who were so much more exposed to the overpowering forces of nature than we are today, should have personified these forces in fear and trembling. But nowadays, when we understand so many natural processes, we have no need for such solutions. I can't for the life of me see how the postulate of an Almighty God helps us in any way. " Paul Dirac
"What i am saying is, if God wanted to send us a message, and ancient writings were the only way he could think of doing it, he could have done a better job." Carl Sagan
"M-theory doesn't disprove God, but it makes him unnecessary." Stephen Hawkins
"Faith cannot move mountains. But it is capable of driving people to such dangerous folly that faith seems to qualify as some kind of mental illness." Richard Dawkins
"There is in every village a torch- the teacher: and an extinguisher the clergyman." Victor Hugo
"Religion? Haven't we outgrown all of this." Steven Weinberg
"I think for many people religion is some sort of moral Viagra." Daniel Dennett
"God is not necessary for morality." Shelly Kagan
"It is natural to think that living things must be the work of a designer. But it was also natural to think the sun went around the earth. Overcoming naive impressions to figure out how things really work, is one of humanity's highest callings." Steven Pinker
"Your welcome to your delusions, but don't say they are supported by science." Victor Stenger
"The religion of one age is the literary entertainment of the next" Emerson
"God was invented to explain mystery." Richard Feynman
"I don't try to imagine a personal god; it suffices to stand in awe at the structure of the world, insofar as it allows our inadequate senses to appreciate it." Einstein
"Religion consists in a set of things which the average man thinks he believes and wishes he was certain of." Samuel Clemens
"A man is accepted into a church for what he believes and he is turned out for what he knows." Samuel Clemens
"It is not as in the Bible, that god created man in his own image. But on the contrary man created god in his image." Ludwig Feurbach
"Isn't it enough to see that a garden is beautiful without having to believe there are fairy's at the bottom of it too" Douglas Adams
"Religion is like a virus that affects the behavior of it's host in such a way to propagate itself further." Jack Pritchard
"To really be free, you need to be free in the mind." Alexander Loutsis
"I am against religion because it teaches us to be satisfied with not understanding the world." Richard Dawkins
"The inspiration of the Bible depends on the ignorance of the person who reads it." Robert G.ingersoll
"...When you understand why you dismiss all other possible gods, you will understand why i dismiss yours." Stephen Roberts
"I have recently been examining all the known superstitions of the world, and do not find in our particular superstition (Christianity) one redeeming feature. They are all alike founded on fables and mythology." Thomas Jefferson
"I can indeed hardly see how anyone ought to wish Christianity to be true for if so the plain language of the text seems to show that the men who do not believe, and this would include my father, brother and almost all of my friends, will be everlastingly punished. And this is a damnable doctrine." Charles Darwin
Feel free to add more quotes or discuss the above :D