"The dialectic is not a magical master key for all questions. It is not an algebra. It is a method of analysis, a method of investigation."

"War is the locomotive of history, but the revolution is its engineer."

"The revolution is a process of class struggle, not a conspiracy."

"The working class cannot simply lay hold of the ready-made state machinery, and wield it for its own purposes."

"The bureaucracy, which by its very nature is conservative, is the principal obstacle to social progress."