Terror, as the demonstration ...

Terror, as the demonstration of the will and strength of the working class, is historically justified, precisely because the proletariat was able thereby to break the political will of the intelligentsia, pacify the professional man of various categories and work, and gradually subordinate them to its own aims within the field of their specialties.
 Leon Trotsky

Quotes from the same author

Dialectical thought is related to vulgar thinking in the same way that a motion picture is related to a still photograph. The motion picture does not outlaw the still photograph but combines a series of them according to the laws of motion.
 Leon Trotsky
The Federated Republic of Europe-the United States of Europe-that is what must be. National autonomy no longer suffices. Economic evolution demands the abolition of national frontiers. If Europe is to remain split into national groups, then Imperialism will recommence its work. Only a Federated Republic of Europe can give peace to the world.
 Leon Trotsky
There are no absolute rules of conduct, either in peace or war. Everything depends on circumstances.
 Leon Trotsky
The bourgeoisie, which far surpasses the proletariat in the completeness and irreconcilibility of its class consciousness, is vitally interested in imposing its moral philosophy upon the exploited masses. It is exactly for this purpose that the concrete norms of the bourgeois catechism are concealed under moral abstractions...The appeal to abstract norms is not a disinterested philosophic mistake but a necessary element in the mechanics of class deception.
 Leon Trotsky
Everyone has a right to be stupid, but Comrade MacDonald abuses the privilege.
 Leon Trotsky