"The victory of Leninism is acclaimed by the people of the whole world, and at the same time cannot but incur the enmity of the imperialists and all reactionaries. The imperialists, to weaken the influence of Leninism and paralyse the revolutionary will of the masses, have launched the most barbarous and despicable attacks and slanders against Leninism, and, moreover, bought up and utilized the vacillators and renegades within the workers' movement, directing them to distort and emasculate the teachings of Lenin. At the end of the nineteenth century when Marxism was putting various anti-Marxist trends to rout, spreading widely throughout the workers' movement and gaining a predominant position, the revisionists represented by Bernstein advanced their revisions of the teachings of Marx to meet the needs of the bourgeoisie. Now, when Leninism has won great victories in guiding the working class and all oppressed classes and nations of the world in onslaughts against imperialism and all kinds of reactionaries, the modern revisionists represented by Tito have advanced their revisions of the teachings of Lenin (that is, modern Marxist teachings), to meet the needs of the imperialists."
January 1, 1970
https://en.wikiquote.org/wiki/Vladimir_Lenin