The real object of the First Amendment was not to countenance, much less advance Mohammedanism, or Judaism or infidelity, by prostrating Christianity; but ... to prevent any national ecclesiastical establishment which should give to a hierarchy the exclusive patronage of the national government.

It should therefore be difficult in a republic to declare war; but not to make peace.

I know of no power, indeed, of which a free people ought to be more jealous, than of that of levying taxes and duties.

It was under a solemn consciousness of the dangers from ecclesiastical ambition, the bigotry of spiritual pride, and the intolerance of sects... that is was deemed advisable to exclude from the national government all power to act upon the subject.

I verily believe Christianity necessary to the support of civil society. One of the beautiful boasts of our municipal jurisprudence is that Christianity is a part of the Common Law... There never has been a period in which the Common Law did not recognize Christianity as lying its foundations.

It yet remains a problem to be solved in human affairs, whether any free government can be permanent, where the public worship of God, and the support of religion, constitute no part of the policy or duty of the state in any assignable shape. The future experience of Christendom, and chiefly of the American states, must settle this problem, as yet new in the history of the world, abundant, as it has been, in experiments in the theory of government.

[I]t is impossible for those, who believe in the truth of Christianity, as a divine revelation, to doubt, that it is the especial duty of government to foster, and encourage it among all the citizens and subjects. This is a point wholly distinct from that of the right of private judgment in matters of religion, and of the freedom of public worship according to the dictates of one's conscience.