Founding Fathers Atheist Quotes by James Madison, Thomas Jefferson, John Adams, John Quincy Adams, Andrew Jackson, Benjamin Franklin and many others.

The purpose of separation of church and state is to keep forever from these shores the ceaseless strife that has soaked the soil of Europe with blood for centuries.
The day will come when the mystical generation of Jesus, by the Supreme Being as his father, in the womb of a virgin, will be classed with the fable of the generation of Minerva in the brain of Jupiter.
The divinity of Jesus is made a convenient cover for absurdity. Nowhere in the Gospels do we find a precept for Creeds, Confessions, Oaths, Doctrines, and whole carloads of other foolish trumpery that we find in Christianity.
July 4th ought to be commemorated as the day of deliverance by solemn acts of devotion.
Those who live by mystery & charlatanerie, fearing you would render them useless by simplifying the Christian philosophy – the most sublime and benevolent, but most perverted system that ever shone on man – endeavored to crush your well-earned & well-deserved fame.
We have no government armed with power capable of contending with human passions unbridled by morality and religion. Our constitution was made for a moral and religious people… it is wholly inadequate to the government of any other.
I could not do otherwise without transcending the limits prescribed by the Constitution for the President and without feeling that I might in some degree disturb the security which religion nowadays enjoys in this country in its complete separation from the political concerns of the General Government.
I looked around for God’s judgments, but saw no signs of them.
The way to see by Faith is to shut the Eye of Reason.
Every one must act according to the dictates of his own reason, and mine tells me that civil powers alone have been given to the President of the United States, and no authority to direct the religious exercises of his constituents.
It is much to be lamented that a man of Franklin’s general good character and great influence should have been an unbeliever in Christianity, and also have done as much as he did to make others unbelievers.
I distrust those people who know so well what God wants them to do, because I notice it always coincides with their own desires.
…It would be more consistent that we call [the Bible] the work of a demon than the word of God. It is a history of wickedness that has served to corrupt and brutalize mankind.
What has been the effect of [religious] coercion? To make one half the world fools, and the other half hypocrites. To support roguery and error all over the earth.
All national institutions of churches, whether Jewish, Christian or Turkish, appear to me no other than human inventions, set up to terrify and enslave mankind, and monopolize power and profit.
Nothing is more dreaded than the national government meddling with religion.
If we did a good act merely from love of God and a belief that it is pleasing to Him, whence arises the morality of the Atheist? …Their virtue, then, must have had some other foundation than the love of God.