Both dogmatism and revisionism run counter to Marxism. It would become lifeless if it remained stagnant and stereotyped. However, the basic principles of Marxism must never be violated, or otherwise mistakes will be made. It is dogmatism to approach Marxism from a metaphysical point of view and to regard it as something rigid. It is revisionism to negate the basic principles of Marxism and to negate its universal truth.
Revisionism is one form of bourgeois ideology.
The revisionists deny the differences between socialism and capitalism, between the dictatorship of the proletariat and the dictatorship of the bourgeoisie. What they advocate is in fact not the socialist line but the capitalist line. In present circumstances, revisionism is more pernicious than dogmatism. One of our current important tasks on the ideological front is to unfold criticism of revisionism. Revisionism, or Right opportunism, is a bourgeois trend of thought that is even more dangerous than dogmatism.