lenin, socialism and religion (1905)

[ah...] The proletariat of today takes the side of socialism, which enlists science in the battle against the fog of religion, and frees the workers from their belief in life after death by welding them together to fight in the present for a better life on earth.
(...) We demand that religion be held a private affair so far as the state is concerned. But by no means can we consider religion a private affair so far as our Party is concerned. Religion must be of no concern to the state, and religious societies must have no connection with governmental authority. Everyone must be absolutely free to profess any religion he pleases, or no religion whatever, i.e., to be an atheist, which every socialist is, as a rule. Discrimination among citizens on account of their religious convictions is wholly intolerable. Even the bare mention of a citizen’s religion in official documents should unquestionably be eliminated. No subsidies should be granted to the established church nor state allowances made to ecclesiastical and religious societies... Complete separation of Church and State is what the socialist proletariat demands of the modern state and the modern church.
(...) Even they are joining in the demand for freedom, are protesting against bureaucratic practices and officialism, against the spying for the police imposed on the “servants of God”. We socialists must lend this movement our support, carrying the demands of honest and sincere members of the clergy to their conclusion, making them stick to their words about freedom, demanding that they should resolutely break all ties between religion and the police. Either you are sincere, in which case you must stand for the complete separation of Church and State and of School and Church, for religion to be declared wholly and absolutely a private affair. Or you do not accept these consistent demands for freedom, in which case you evidently are still held captive by the traditions of the inquisition...
(...) So far as the party of the socialist proletariat is concerned, religion is not a private affair. Our Party is an association of class-conscious, advanced fighters for the emancipation of the working class. Such an association cannot and must not be indifferent to lack of class-consciousness, ignorance or obscurantism in the shape of religious beliefs. We demand complete disestablishment of the Church so as to be able to combat the religious fog with purely ideo logical and solely ideological weapons, by means of our press and by word of mouth. But we founded our association, the Russian Social-Democratic Labour Party, precisely for such a struggle against every religious bamboozling of the workers. And to us the ideological struggle is not a private affair, but the affair of the whole Party, of the whole proletariat.
(...) If that is so, why do we not declare in our Programme that we are atheists? Why do we not forbid Christians and other believers in God to join our Party? The answer to this question will serve to explain the very important difference in the way the question of religion is presented by the bourgeois democrats and the Social-Democrats. Our Programme is based entirely on the scientific, and moreover the materialist, world-outlook. An explanation of our Programme, therefore, necessarily includes an explanation of the true historical and economic roots of the religious fog.
(...) [absolutely right] But under no circumstances ought we to fall into the error of posing the religious question in an abstract, idealistic fashion, as an “intellectual” question unconnected with the class struggle, as is not infrequently done by the radical-democrats from among the bourgeoisie. It would be stupid to think that, in a society based on the endless oppression and coarsening of the worker masses, religious prejudices could be dispelled by purely propaganda methods. It would be bourgeois narrow-mindedness to forget that the yoke of religion that weighs upon mankind is merely a product and reflection of the economic yoke within society. No number of pamphlets and no amount of preaching can enlighten the proletariat, if it is not enlightened by its own struggle against the dark forces of capitalism. Unity in this really revolutionary struggle of the oppressed class for the creation of a paradise on earth is more important to us than unity of proletarian opinion on paradise in heaven.