Without doubt, machinery has greatly increased the number of well-to-do idlers.

Men can see nothing around them that is not their own image; everything speaks to them of themselves. Their very landscape is alive.

Science and democracy are the right and left hands of what I'll refer to as the move from the realm of necessity to the realm of freedom.

The need of a constantly expanding market for its products chases the bourgeoisie over the entire surface of the globe.

All science would be superfluous if the outward appearance and the essence of things directly coincided.

The materialist doctrine that men are products of circumstances and upbringing, and that, therefore, changed men are products of other circumstances and changed upbrinding, forgets that it is men that change circumstances and that the educator himself needs educating.

Religion is the opium of the people translated from the German Die Religion ... ist das Opium des Volkessometimes misquoted as opiate of the people.