Dialectical materialism holds that the root of universal connection and eternal development in the world is contradiction. But contradiction does not necessarily mean disharmony, because identity and struggle are two fundamental attributes of contradiction, and the promotion of identity and struggle to the development of things is realized through the combination of the two. But if we don't face up to the contradiction and solve it correctly and effectively, it will inevitably lead to disharmony. Under the new situation, social contradictions are not gone, but more complicated. Therefore, correctly handling various social contradictions is an inevitable requirement for building a harmonious socialist society. The contradiction mentioned here does not mean the contradiction in thinking caused by the violation of the law of contradiction in formal logic, nor is it a man-made contradiction, but a dialectical contradiction. Dialectical contradiction contains two meanings: first, the existence of this contradiction is objective. People can neither subjectively and arbitrarily create a non-existent contradiction, nor subjectively and arbitrarily obliterate an objective contradiction, but can only face it squarely. Second, the nature, position and function of contradictions also exist objectively. No one can take it for granted to confuse the different nature of contradictions and reverse the primary and secondary status of contradictions. General Secretary Hu Jintao pointed out that it is necessary to strengthen the analysis of the causes of contradictions among the people under the new situation, especially the deep-seated causes ... improve the ways and means of handling contradictions among the people, and properly handle contradictions among the people in a timely manner. Therefore, the correct path to harmony is to treat and analyze the dialectical contradictions in social life according to the principle of materialism, so as to solve them.

While China is developing rapidly, we should also pay attention to a remarkable feature of this period-the coexistence of golden development period and prominent contradiction period. Studying materialist dialectics, correctly understanding the law of unity of opposites, adhering to the contradiction analysis method, and studying the universality, particularity and relationship of contradictions are of special significance to the construction of a harmonious society at present and for a long time to come. Protrusion is a term to describe the current social contradictions in China. I understand that this word contains two meanings: one is the expansion of quantity. Comrade Mao Zedong put forward the concept of "contradictions among the people" in 1957, which mainly refers to ideological contradictions and political contradictions. At present, contradictions among the people extend to all aspects of all classes, including economic interests, long-term interests and short-term interests, overall interests and personal interests, and regional interests. Second, the complexity has increased. China is in the period of social and economic transformation, and the contradictions among the people are complicated, including those in economic operation, social operation and cultural construction.

When people talk about harmony, they often divide it into three categories: the harmony between man and nature, the harmony of various systems (politics, economy and culture) within society, and the harmony between people. But we can't ignore "invisible harmony", that is, the harmony of individual's own interests, spirit, psychology and value recognition. Camus, a Nobel Prize in Literature winner, a famous French writer and philosopher, once revealed a phenomenon in the philosophical sense: when a person finds that there is no beautiful and lofty purpose to fill the gap between himself and his destiny, and there is no bridge to heaven or paradise on earth on this gap, the spirit of resistance arises spontaneously. Camus gave us important enlightenment: the micro-foundation of social harmony can not be ignored, and so can the internal psychological harmony of individuals. Psychological harmony within individuals depends not only on the satisfaction of material life, but also on the importance attached to the construction of individual ideals and beliefs. If people have no ideals and beliefs, there is no meaning of survival. Therefore, Heraclitus said, "Invisible harmony is better than visible harmony", and we should add that invisible harmony is more important than visible harmony. To realize the internal harmony of individuals, we need to do a lot of work in the aspects of "the virtue of Tao", "the gift of Qi" and "the joy of harmony".