The law of unity of opposites, also known as the law of contradiction, is the essence and core of materialist dialectics and the fundamental principle for people to understand and transform the world. The law of unity of opposites is also an important symbol of the difference between materialist dialectics and metaphysics.

Materialist dialectics holds that the world is made up of contradictions. Contradictions are everywhere, and this is the universality of contradictions. Contradictions have different manifestations in different things or different stages of development of the same thing, which is the particularity of contradictions.

Contradiction is a philosophical category that reflects the opposition, identity and their relationship within or between things. The identity of contradiction means that the two opposites of contradiction are interdependent and can be transformed into each other under certain conditions. Contradiction means that the two opposites of contradiction are mutually exclusive and tend to separate from each other.

Correctly understanding the contradictions in life and handling their unity of opposites can improve our work, improve our learning efficiency and help us to succeed. In college, I think there are mainly the following contradictions.