Religions are all alike -- founded upon fables and mythologies

I am for freedom of religion and against all maneuvers to bring about a legal ascendancy of one sect over another

Neither Pagan nor Mahamedan nor Jew ought to be excluded from the civil rights of the Commonwealth because of his religion. -quoting John Locke's argument.

The legitimate powers of government extend to such acts only as are injurious to others. 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.

I never submitted the whole system of my opinions to the creed of any party of men whatever, in religion, in philosophy, in politics or in anything else, where I was capable of thinking for myself. Such an addiction is the last degradation of a free and moral agent. If I could not go to Heaven but with a party, I would not go there at all.

I write nothing for publication, and last of all things should it be on the subject of religion. On the dogmas of religion as distinguished from moral principles, all mankind, from the beginning of the world to this day, have been quarrelling, fighting, burning and torturing one another, for abstractions unintelligible to themselves and to all others, and absolutely beyond the comprehension of the human mind. Were I to enter on that arena, I should only add an unit to the number of Bedlamites.

[Letter to Mathew Carey, 11 November 1816]