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

Although gold and silver are not by nature money, money is by nature gold and silver.

The meaning of peace is the absence of opposition to socialism.

The more a ruling class is able to assimilate the most prominent men of a ruled class, the more solid and dangerous its rule.

Accumulate, accumulate! This is Moses and the Prophets!

In the national struggles of the proletarians of the different countries, they point out and bring to the front the common interest of the entire proletariat, independently of all nationality.

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.