Before a revolution happens, it is perceived as impossible; after it happens, it is seen as having been inevitable.

The more that social democracy develops, grows, and becomes stronger, the more the enlightened masses of workers will take their own destinies, the leadership of their movement, and the determination of its direction into their own hands.

Marxism must abhor nothing so much as the possibility that it becomes congealed in its current form. It is at its best when butting heads in self-criticism, and in historical thunder and lightning, it retains its strength.

Marxism is a revolutionary worldview that must always struggle for new revelations.

Capitalism, as a result of its own inner contradictions, moves toward a point when it will be unbalanced, when it will simply become impossible.

We will be victorious if we have not forgotten how to learn.

The masses are in reality their own leaders, dialectically creating their own development process.