Marxism is always open, always critical, always self-critical.

You can have relatively high levels of class consciousness with a lower level of class militancy than one would have expected.

Precisely because Marx was convinced that the cause of the proletariat was of decisive importance for the whole future of mankind, he wanted to create for that cause not a flimsy platform of rhetorical invective or wishful thinking, but the rock-like foundation of scientific truth.

Marxism is always open, always critical, always self-critical.

Revolution is an instrument, like a party is an instrument.

Periodically, the workers do revolt against bourgeois society, not by a hundred, five hundred, or a thousand, but by the millions.

There are no conditions in which we subordinate the interests of the class as a whole to the interests of any sect, any chapel, any separate organization.