Darwin's book is very important and serves me as a basis in natural science for the class struggle in history. One has to put up with the crude English method of development, of course. Despite all deficiencies not only is the death-blow dealt here for the first time to 'teleology' in the natural sciences, but their rational meaning is empirically explained.

Religion is only the illusory sun which revolves round man as long as he does not revolve round himself.

We have no compassion and we ask no compassion from you. When our turn comes, we shall not make excuses for the terror.

Private property has made us so stupid and one-sided that an object is only ours when we have it

Misery motivates, not utopia.

Society is a sort of organism on the growth of which conscious efforts can exercise little effect.

Workers of the world unite; you have nothing to lose but your chains.