Us Founding Fathers Quotes by John Adams, Thomas Jefferson, James Madison, John Quincy Adams, George Washington, Thomas Paine and many others.

I almost shudder at the thought of alluding to the most fatal example of the abuses of grief which the history of mankind has preserved – the Cross. Consider what calamities that engine of grief has produced!
Christianity neither is, nor ever was a part of the common law.
No man shall be compelled to frequent or support any religious worship, place, or ministry whatsoever.
History, I believe, furnishes no example of a priest-ridden people maintaining a free civil government.
If by religion we are to understand sectarian dogmas, in which no two of them agree, then your exclamation on that hypothesis is just, “that this would be the best of worlds if there were no religion in it.
Question with boldness even the existence of a god.
The God who gave us life gave us liberty. Can the liberties of a nation be secure when we have removed a conviction that these liberties are the gift of God?
Every new and successful example of a perfect separation between ecclesiastical and civil matters is of importance.
Is it not that, in the chain of human events, the birthday of the nation is indissolubly linked with the birthday of the Saviour?
It is our boast, that a man’s religious tenets will not forfeit the protection of the Laws.
The doctrines of Jesus are simple, and tend to all the happiness of man.
July 4th ought to be commemorated as the day of deliverance by solemn acts of devotion.
History, I believe, furnishes no example of a priest-ridden people maintaining a free civil government. This marks the lowest grade of ignorance of which their civil as well as religious leaders will always avail themselves for their own purposes.
Let us with Caution indulge the supposition that morality can be maintained without religion.
The legitimate powers of government extend to such acts only as are injurious to others. But it does me no injury for my neighbor to say there are twenty gods, or no god. It neither picks my pocket nor breaks my leg.
Government, even in its best state, is but a necessary evil; in its worst state, an intolerable one.
Creeds have been the bane of the Christian church … made of Christendom a slaughter-house.