Luxury is the opposite of the naturally necessary.

Religion is the sigh of the oppressed creature, the heart of a heartless world, and the soul of soulless conditions. It is the opium of the people.

When commercial capital occupies a position of unquestioned ascendancy, it everywhere constitutes a system of plunder.

You will have to go through 15, 20, 50 years of civil wars and national struggles not only to bring about a change in society but also to change yourselves, and prepare yourselves for the exercise of political power.

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

The fact that labour is external to the worker, i.e., it does not belong to his intrinsic nature; that in his work, therefore he does not affirm himself but denies himself, does not feel content but unhappy, does not develop freely his physical and mental energy but mortifies his body and his mind. The worker therefore only feels himself outside his work, and in his work feels outside himself.

Men's ideas are the most direct emanations of their material state.