A comprehensive understanding of contradiction view of Marxist classical writers

Despite developing from the same origin, the contradiction views held by Marxist classical writers are different. Marx proposes the “mutual existence, struggle and mixing” and Engel “mutual infiltration and transformation of opposites”; Lenin believes in the “unity of opposites” and Starlin in the “struggle of opposites”; and Mao Zedong advocates the “unity of opposites” and “two sides to everything”. We should have a comprehensive understanding of these theories so as to avoid the mechanical and misleading quotation.