Thomas Jefferson on Religiousness

“I believe, with the Quaker preacher, that he who steadily observes those moral precepts in which all religions concur, will never be questioned at the gates of heaven, as to the dogmas in which they all differ.”

“Among the most inestimable of our blessings, also, is that you so justly particularize, of liberty to worship our Creator in the way we think most agreeable to His will; a liberty deemed in other countries incompatible with good government, and yet proved by our experience to be its best support.”

“I join you, therefore, in sincere congratulations that this den of the priesthood is at length broken up, and that a Protestant Popedom is no longer to disgrace the American history and character. If by religion, we are 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 all possible worlds, if there were no religion in it." But if the moral precepts, innate in man, and made a part of his physical constitution, as necessary for a social being, if the sublime doctrines of philanthropism and deism taught us by Jesus of Nazareth, in which all agree, constitute true religion, then, without it, this would be, as you again say, "something not fit to be named, even indeed, a hell."”

“I promised you a letter on Christianity, which I have not forgotten. On the contrary, it is because I have reflected on it, that I find much more time necessary for it than I can at present dispose of. I have a view of the subject which ought to displease neither the rational Christian nor Deists, and would reconcile many to a character they have too hastily rejected. I do not know that it would reconcile the genus irritabile vatum who are all in arms against me. Their hostility is on too interesting ground to be softened. The delusion into which the X. Y. Z. plot showed it possible to push the people; the successful experiment made under the prevalence of that delusion on the clause of the Constitution, which, while it secured the freedom of the press, covered also the freedom of religion, had given to the clergy a very favorite hope of obtaining an establishment of a particular form of Christianity through the United States; and as every sect believes its own form the true one, every one perhaps hoped for his own, but especially the Episcopalians and Congregationalists. The returning good sense of our country threatens abortion to their hopes, and they believe that any portion of power confided to me, will be exerted in opposition to their schemes. And they believe rightly: for I have sworn upon the altar of God, eternal hostility against every form of tyranny over the mind of man. But this is all they have to fear from me: and enough too in their opinion.”