History has different yardsticks for the cruelty of the Northerners and the cruelty of the Southerners in the Civil War. A slave-owner who through cunning and violence shackles a slave in chains, and a slave who through cunning or violence breaks the chains – let not the contemptible eunuchs tell us that they are equals before a court of morality!

Is it possible to fulfill this task, is it possible to achieve the definite victory of Socialism in one country without the combined efforts of the proletarians of several advanced countries? No, it is impossible.

What shall we call an "immediate possibility"? In 1923 the situation in Germany was profoundly revolutionary, but what was lacking for a victorious revolution was a correct strategy.

Learning carries within itself certain dangers because out of necessity one has to learn from one's enemies.

Dialectical thought is related to vulgar thinking in the same way that a motion picture is related to a still photograph. The motion picture does not outlaw the still photograph but combines a series of them according to the laws of motion.

National self-sufficiency or "autarchy" is the ideal of [Adolf] Hitler, not of [Karl] Marx and [Vladimir] Lenin.

Fascism is nothing but capitalist reaction...