Here are a few of my favorite quotes about religion:
Atheism leaves a man to sense, to philosophy, to natural piety, to laws, to reputation; all of which may be guides to an outward moral virtue, even if religion vanished; but religious superstition dismounts all these and erects an absolute monarchy in the minds of men.
My atheism, like that of Spinoza, is true piety towards the universe and denies only gods fashioned by men in their own image to be servants of their human interests.
The President of the United States summons the nation to church on Thanksgiving Day to give thanks to "Almighty God" for the abundant harvest and all other blessings. But what has Almighty God -- I have no desire to appear irreverent -- what has Almighty God as a personal being to do with the harvests? If it is he who produces our crops, then being Almighty there should never be a failure of crops. But since crops frequently fail, it follows that there is no Almighty person in charge of them -- unless he brings failure purposely. Therefore, if God is to be thanked for large crops, he must be blamed when the crops are a failure. . . . If God sends the rain and the sunshine which develops and ripens our wheat, who sends the storms and the insects which destroy much of it? And if he sends both, then why not thank him for one and blame him for the other?
Question with boldness even the existence of a God; because, if there be one, he must more approve of the homage of reason, than that of blind-folded fear.
John Lovejoy Elliott:
I have known many good people who did not believe in God. But I have never known a human being who was good who did not believe in people. [language slightly modified]