First, religion was giving opium to the people "tomorrow," "after death." Millions of people remained in that state of druggedness, under that chloroform -- religious chloroform.
Now politics is doing the same. Even communism has proved nothing but a new opium for the masses -- communism is a new kind of religion. The strategy is the same: "Tomorrow will come the revolution, and everything will be all right." You have to sacrifice your today for tomorrow, and the tomorrow never comes.