Man emancipates himself politically from religion by banishing it from the sphere of public law to that of private law.
Religion is no longer the spirit of the state, in which man behaves – although in a limited way, in a particular form, and in a particular sphere – as a species-being, in community with other men.
Religion has become the spirit of civil society, of the sphere of egoism, of bellum omnium contra omnes. It is no longer the essence of community, but the essence of difference. It has become the expression of man’s separation from his community, from himself and from other men – as it was originally.
It is only the abstract avowal of specific perversity, private whimsy, and arbitrariness.
The endless fragmentation of religion in North America, for example, gives it even externally the form of a purely individual affair. It has been thrust among the multitude of private interests and ejected from the community as such.
But one should be under no illusion about the limits of political emancipation.
The division of the human being into a public man and a private man, the displacement of religion from the state into civil society, this is not a stage of political emancipation but its completion; this emancipation, therefore, neither abolished the real religiousness of man, nor strives to do so.
The decomposition of man into Jew and citizen, Protestant and citizen, religious man and citizen, is neither a deception directed against citizenhood, nor is it a circumvention of political emancipation, it is political emancipation itself, the political method of emancipating oneself from religion.
Of course, in periods when the political state as such is born violently out of civil society, when political liberation is the form in which men strive to achieve their liberation, the state can and must go as far as the abolition of religion, the destruction of religion.
But it can do so only in the same way that it proceeds to the abolition of private property, to the maximum, to confiscation, to progressive taxation, just as it goes as far as the abolition of life, the guillotine.
At times of special self-confidence, political life seeks to suppress its prerequisite, civil society and the elements composing this society, and to constitute itself as the real species-life of man, devoid of contradictions. But, it can achieve this only by coming into violent contradiction with its own conditions of life, only by declaring the revolution to be permanent, and, therefore, the political drama necessarily ends with the re-establishment of religion, private property, and all elements of civil society, just as war ends with peace.
Indeed, the perfect Christian state is not the so-called Christian state – which acknowledges Christianity as its basis, as the state religion, and, therefore, adopts an exclusive attitude towards other religions.
On the contrary, the perfect Christian state is the atheistic state, the democratic state, the state which relegates religion to a place among the other elements of civil society.
The state which is still theological, which still officially professes Christianity as its creed, which still does not dare to proclaim itself as a state, has, in its reality as a state, not yet succeeded in expressing the human basis – of which Christianity is the high-flown expression – in a secular, human form.
The so-called Christian state is simply nothing more than a non-state, since it is not Christianity as a religion, but only the human background of the Christian religion, which can find its expression in actual human creations.
The so-called Christian state is the Christian negation of the state, but by no means the political realization of Christianity.
The state which still professes Christianity in the form of religion, does not yet profess it in the form appropriate to the state, for it still has a religious attitude towards religion – that is to say, it is not the true implementation of the human basis of religion, because it still relies on the unreal, imaginary form of this human core.
The so-called Christian state is the imperfect state, and the Christian religion is regarded by it as the supplementation and sanctification of its imperfection. For the Christian state, therefore, religion necessarily becomes a means; hence, it is a hypocritical state.
It makes a great difference whether the complete state, because of the defect inherent in the general nature of the state, counts religion among its presuppositions, or whether the incomplete state, because of the defect inherent in its particular existence as a defective state, declares that religion is its basis.
In the latter case, religion becomes imperfect politics.
In the former case, the imperfection even of consummate politics becomes evident in religion.
The so-called Christian state needs the Christian religion in order to complete itself as a state. The democratic state, the real state, does not need religion for its political completion.
On the contrary, it can disregard religion because in it the human basis of religion is realized in a secular manner.
The so-called Christian state, on the other hand, has a political attitude to religion and a religious attitude to politics. By degrading the forms of the state to mere semblance, it equally degrades religion to mere semblance.
http://www.marxists.org/archive/marx/works/1844/jewish-question/