The road to socialism lies through a period of the highest possible intensification of the principle of the state … Just as a lamp, before going out, shoots up in a brilliant flame, so the state, before disappearing, assumes the form of the dictatorship of the proletariat, i. e., the most ruthless form of state, which embraces the life of the citizens authoritatively in every direction...

Terrorism and Communism : A Reply to Karl Kautsky (1920; 1975), p. 177