Without revolutionary theory there can be no revolutionary movement.

Whenever the cause of the people is entrusted to professors, it is lost.

You can become a Communist only when you enrich your mind with a knowledge of all the treasures created by mankind.

You must have your heart on fire and your brain on ice.

To decide once every few years which members of the ruling class is to repress and crush the people through parliament-this is the real essence of bourgeois parliamentarism, not only in parliamentary- constitutional monarchies, but also in the most democratic republics.

The Jewish bourgeoisie are our enemies, not as Jews but as bourgeoisie. The Jewish worker is our brother.

The suppression of the bourgeois state by the proletarian state is impossible without violent revolution.