Change the economic base and you will change human beings.

While the miser is merely a capitalist gone mad, the capitalist is a rational miser.

In this sense, the theory of the Communists may be summed up in the single sentence: Abolition of private property. - Manifesto of the Communist Party

But the more these conscious illusions of the ruling class are shown to be false and the less they satisfy common sense, the more dogmatically they are asserted and the more deceitful, moralizing and spiritual becomes the language of established society.

The abolition of religion as the illusory happiness of the people is the demand for their real happiness. To call on them to give up their illusions about their condition is to call on them to give up a condition that requires illusions. The criticism of religion is, therefore, in embryo, the criticism of that vale of tears of which religion is the halo.

A nation that enslaves another forges its own chains.

The proletarians have nothing to loose but their chains. They have a world to win.