In the era when Marx lived, most working people lived in poverty and the society was full of all kinds of injustice. The poor are exploited and the rich live a luxurious life ... The result of thinking about this phenomenon makes him think that religion is the opium of the people, because religion provides people with the meaning and value of life and teaches people to accept the suffering in secular life and pursue the value of eternal life. Because of this value, people only pay attention to the pursuit of eternal life, ignoring all kinds of urgent needs in people's real life, no longer trying to build a secular society, no progress, and no intention to improve their poor and backward living conditions. The practical influence of this kind of values on people's secular life is just like the influence of opium on people. So he put forward the view that religion is opium from the standpoint of atheism. This concept is deeply influenced by the background of the times and is too one-sided. Because this concept ignores the positive contribution of religion to human society and only sees some negative phenomena of religion, and this concept is also based on some understanding of religious mistakes. Because in a real religion, people will never just be taught to blindly pursue the value of eternal life, but on the one hand, they will be invited to yearn for eternal life, on the other hand, they will be encouraged to actively build a secular society and take this world as the only way for eternal life. The value of eternal life also provides spiritual strength for people to build a society, so that people will not lose confidence because of setbacks and various difficulties, and lose the courage and confidence to build a harmonious and happy society, but bravely face various problems and difficulties and overcome all obstacles.