Inside the Party, Stalin has put himself above all criticism and the State. It is impossible to displace him except by assassination. Every oppositio… - Leon Trotsky

Fascism is nothing but capitalist reaction; from the point of view of the proletariat the difference between the types of reaction is meaningless.

The ancient philosopher said that strife is the father of all things. No new values can be created where a free conflict of ideas is impossible. To be sure, a revolutionary dictatorship means by its very essence strict limitations of freedom. But for that very reason epochs of revolution have never been directly favorable to cultural creation: they have only cleared the arena for it. The dictatorship of the proletariat opens a wider scope to human genius the more it ceases to be a dictatorship. The socialist culture will flourish only in proportion to the dying away of the state.

Generally speaking, by the way, that is the moral of the opponents of violence in politics: they renounce violence when it comes to introducing changes in what already exists, but in defense of the existing order they will not stop at the most ruthless acts.