Freedom is the recognition of necessity.

All that is real in human history becomes irrational in the process of time.

Freedom does not consist in any dreamt-of independence from natural laws, but in the knowledge of these laws, and in the possibility this gives of systematically making them work towards definite ends.

People think they have taken quite an extraordinarily bold step forward when they have rid themselves of belief in hereditary monarchy and swear by the democratic republic. In reality, however, the state is nothing but a machine for the oppression of one class by another, and indeed in the democratic republic no less than in the monarchy.

Without analysis, no synthesis.

In a political struggle of class against class, organization of trade unions is the most important weapon.

It is no longer a question anywhere of inventing interconnections from out of our brains, but of discovering them in the facts.