This quote is reproduced a great deal and is probably the only Marx quote that most people are familiar with. Unfortunately, if someone is familiar with it they are likely only familiar with a small portion that, taken by itself, tends to give a distorted impression of what Marx had to say about religion.
- Religious distress is at the same time the expression of real distress and the protest against real distress. Religion is the sigh of the oppressed creature, the heart of a heartless world, just as it is the spirit of a spiritless situation. It is the opium of the people. The abolition of religion as the illusory happiness of the people is required for their real happiness. The demand to give up the illusion about its condition is the demand to give up a condition which needs illusions.
Karl Marx, Critique of Hegels Philosophy of Right
Usually all one gets from the above is Religion is the opium of the people (with no ellipses to indicate that something has been removed). Sometimes Religion is the sigh of the oppressed creature is included. If you compare these with the full quotation, its clear that a great deal more is being said than what most people are aware of.
In the above quotation Marx is saying that religions purpose is to create illusory fantasies for the poor. Economic realities prevent them from finding true happiness in this life, so religion tells them that this is OK because they will find true happiness in the next life. Although this is a criticism of religion, Marx is not without sympathy: people are in distress and religion provides solace, just as people who are physically injured receive relief from opiate-based drugs.
The quote is not, then, as negative as most portray (at least about religion). In some ways, even the slightly extended quote which people might see is a bit dishonest because saying Religion is the sigh of the oppressed creature... deliberately leaves out the additional statement that it is also the heart of a heartless world.
What we have is a critique of society that has become heartless rather than of religion which tries to provide a bit of solace. One can argue that Marx offers a partial validation of religion in that it tries to become the heart of a heartless world. For all its problems, religion doesnt matter so much it is not the real problem. Religion is a set of ideas, and ideas are expressions of material realities. Religion is a symptom of a disease, not the disease itself.
Still, it would be a mistake to think that Marx is uncritical towards religion it may try to provide heart, but it fails. For Marx, the problem lies in the obvious fact that an opiate drug fails to fix a physical injury it merely helps you forget pain and suffering. This may be fine up to a point, but only as long as you are also trying to solve the underlying problems causing the pain. Similarly, religion does not fix the underlying causes of peoples pain and suffering instead, it helps them forget why they are suffering and gets them to look forward to an imaginary future when the pain will cease.
Even worse, this drug is administered by the same oppressors who are responsible for the pain and suffering in the first place. Religion is an expression of more fundamental unhappiness and symptom of more fundamental and oppressive economic realities. Hopefully, humans will create a society in which the economic conditions causing so much pain and suffering would be eradicated and, therefore, the need for soothing drugs like religion will cease. Of course, for Marx such a turn of events isnt to be hoped for because human history was leading inevitably towards it.
So, in spite of his obvious dislike of and anger towards religion, Marx did not make religion the primary enemy of workers and communists, regardless of what might have been done by 20th century communists. Had Marx regarded religion as a more serious enemy, he would have devoted more time to it in his writings. Instead, he focused on economic and political structures that in his mind served to oppress people.
For this reason, some Marxists could be sympathetic to religion. Karl Kautsky, in his Foundations of Christianity, wrote that early Christianity was, in some respects, a proletarian revolution against privileged Roman oppressors. In Latin America, some Catholic theologians have used Marxist categories to frame their critique of economic injustice, resulting in liberation theology.
Marxs relationship with and ideas about religion are more complex than most realize. Marxs analysis of religion has flaws, but despite them his perspective is worth taking seriously. Specifically, he argues that religion is not so much an independent thing in society but, rather, a reflection or creation of other, more fundamental things like economic relationships. Thats not the only way of looking at religion, but it can provide some interesting illumination on the social roles that religion plays.