The abolition of religion as the illusory happiness of the people is the demand for their real happiness. To call on them to give up their illusions about their condition is to call on them to give up a condition that requires illusions. The criticism of religion is, therefore, in embryo, the criticism of that vale of tears of which religion is the halo.

Communism begins where atheism begins.

So in Jewry we recognise a contemporary universal anti-social phenomenon, which has reached its present pitch through a process of, historical development in which the Jews have zealously co-operated. And this evil anti-social aspect of Jewry has grown to a stage at which: it must necessarily collapse.

It's possible that I shall make an ass of myself. But in that case one can always get out of it with a little dialectic. I have, of course, so worded my proposition as to be right either way.

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.

Without the presence of class warfare, trade unions would be hard put to justfy their existence.