In religion and politics people's beliefs and convictions are in almost every case gotten at second-hand, and without examination, from authorities who have not themselves examined the questions at issue but have taken them at second-hand from other non-examiners, whose opinions about them were not worth a brass farthing.
- Autobiography of Mark Twain


Too much blood has been shed by the Church because of an omission from the Gospel: "Ye shall be indifferent as to what your neighbor's religion is." Not merely tolerant of it, but indifferent to it. Divinity is claimed for many religions; but no religion is great enough or divine enough to add that new law to its code.
- Mark Twain, a Biography


We despise all reverences and all the objects of reverence which are outside the pale of our own list of sacred things. And yet, with strange inconsistency, we are shocked when other people despise and defile the things which are holy to us.
- Following the Equator

Man is a Religious Animal. He is the only Religious Animal. He is the only animal that has the True Religion--several of them. He is the only animal that loves his neighbor as himself and cuts his throat if his theology isn't straight. He has made a graveyard of the globe in trying his honest best to smooth his brother's path to happiness and heaven....The higher animals have no religion. And we are told that they are going to be left out in the Hereafter. I wonder why? It seems questionable taste.
- "The Lowest Animal"

I am quite sure now that often, very often, in matters concerning religion and politics a man's reasoning powers are not above the monkey's.
- Mark Twain in Eruption

Man is kind enough when he is not excited by religion.
- A Horse's Tale

I have a religion--but you will call it blasphemy. It is that there is a God for the rich man but none for the poor.....Perhaps your religion will sustain you, will feed you--I place no dependence in mine. Our religions are alike, though, in one respect--neither can make a man happy when he is out of luck.
- Letter to Orion Clemens, 10/19-20/1865

Religion consists in a set of things which the average man thinks he believes, and wishes he was certain.
- Notebook, 1879

Apparently one of the most uncertain things in the world is the funeral of a religion.
- Following the Equator