Accumulation of wealth at one pole is at the same time accumulation of misery, agony of toil, slavery, ignorance, brutality, mental degradation, at the opposite pole

The social revolution...cannot draw its poetry from the past, but only from the future. It cannot begin with itself before it has stripped itself of all superstitions concerning the past.

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.

In the eyes of dialectical philosophy, nothing is established for all times, nothing is absolute or sacred.

The weapon of criticism can never replace the criticism of weapons.

The country that is more developed industrially only shows, to the less developed, the image of its own future.

The human being is in the most literal sense a political animal, not merely a gregarious animal, but an animal which can individuate itself only in the midst of society.