马克思主义的哲学认为，对立统一规律是宇宙的根本规律。这个规律，不论在自然界、人类社会和人们的思想中，都是普遍存在的。矛盾着的对立面又统一，又斗争，由此推动事物的运动和变化。矛盾是普遍存在的，不过按事物的性质不同，矛盾的性质也就不同。对于任何一个具体的事物说来，对立的统一是有条件的、暂时的、过渡的，… - Mao Zedong

Why must there be a revolutionary party? There must be a revolutionary party because the world contains enemies who oppress the people and the people want to throw off enemy oppression. In the era of capitalism and imperialism, just such a revolutionary party as the Communist Party is needed. Without such a party it is simply impossible for the people to throw off enemy oppression. We are Communists, we want to lead the people in overthrowing the enemy, and so we must keep our ranks in good order, we must march in step, our troops must be picked troops and our weapons good weapons. Without these conditions the enemy cannot be overthrown.

Man's social practice is not confined to activity in production, but takes many other forms--class struggle, political life, scientific and artistic pursuits; in short, as a social being, man participates in all spheres of the practical life of society. Thus man, in varying degrees, comes to know the different relations between man and man, not only through his material life but also through his political and cultural life (both of which are intimately bound up with material life). Of these other types of social practice, class struggle in particular, in all its various forms, exerts a profound influence on the development of man's knowledge. In class society everyone lives as a member of a particular class, and every kind of thinking, without exception, is stamped with the brand of a class.

Being a bourgeoisie in a colonial and semi-colonial country and oppressed by imperialism, the Chinese national bourgeoisie retains a certain revolutionary quality at certain periods and to a certain degree--even in the era of imperialism--in its opposition to the foreign imperialists and the domestic governments of bureaucrats and warlords (instances of opposition to the latter can be found in the periods of the Revolution of 1911 and the Northern Expedition), and it may ally itself with the proletariat and the petty bourgeoisie against such enemies as it is ready to oppose. In this respect the Chinese bourgeoisie differs from the bourgeoisie of old tsarist Russia. Since tsarist Russia was a military-feudal imperialism which carried on aggression against other countries, the Russian bourgeoisie was entirely lacking in revolutionary quality. There, the task of the proletariat was to oppose the bourgeoisie, not to unite with it. But China's national bourgeoisie has a revolutionary quality at certain periods and to a certain degree, because China is a colonial and semi-colonial country which is a victim of aggression. Here, the task of the proletariat is to form a united front with the national bourgeoisie against imperialism and the bureaucrat and warlord governments without overlooking its revolutionary quality. At the same time, however, being a bourgeois class in a colonial and semi-colonial country and so being extremely flabby economically and politically, the Chinese national bourgeoisie also has another quality, namely, a proneness to conciliation with the enemies of the revolution. Even when it takes part in the revolution, it is unwilling to break with imperialism completely and, moreover, it is closely associated with the exploitation of the rural areas through land rent; thus it is neither willing nor able to overthrow imperialism, and much less the feudal forces, in a thorough way. So neither of the two basic problems or tasks of China's bourgeois-democratic revolution can be solved or accomplished by the national bourgeoisie. As for China's big bourgeoisie, which is represented by the Kuomintang, all through the long period from 1927 to 1937 it nestled in the arms of the imperialists and formed an alliance with the feudal forces against the revolutionary people. In 1927 and for some time afterwards, the Chinese national bourgeoisie also followed the counter-revolution. During the present anti-Japanese war, the section of the big bourgeoisie represented by Wang Ching-wei has capitulated to the enemy, which constitutes a fresh betrayal on the part of the big bourgeoisie. In this respect, then, the bourgeoisie in China differs from the earlier bourgeoisie of the European and American countries, and especially of France. When the bourgeoisie in those countries, and especially in France, was still in its revolutionary era, the bourgeois revolution was comparatively thorough, whereas the bourgeoisie in China lacks even this degree of thoroughness.