A knowledge system in a certain field formed by summarizing the knowledge and experience gained in practice is a theory.

Scientific theory is abstracted from objective reality and proved in objective reality, which correctly reflects the essence and laws of objective things.

2. Dialectical relationship between theory and practice

(1) Practice is the basis of theory, that is, practice plays a decisive role in theory.

(2) Theory reacts to practice, scientific theory has a positive guiding role in practice, and wrong theory has a hindering role.

(3) Theory and practice complement each other and are indispensable. We cannot arbitrarily separate the dialectical relationship between them and emphasize one aspect in isolation.

3. The guiding role of scientific theory in practice

(1) through the phenomenon of things, grasp the essence of things and the inherent inevitable connection of things. It reflects the development law of things, so it can make us look at the overall situation, be far-sighted, foresee the development trend of things, determine the development direction of things, and thus guide people's practice.

(2) It can provide scientific methods to improve people's cognitive ability and provide scientific cognitive tools for people to seek truth.

(3) It can be an ideological weapon to emancipate people's minds and break superstitions.

People's practice is inseparable from scientific theory. Practice without theoretical guidance is blind practice.

4. Adhere to the combination of theory and practice

① Theory must be combined with practice, because: on the one hand, practice can only achieve the goal of transforming the objective world under the guidance of scientific theory; On the other hand, theory can only be tested and developed by combining with practice, and it can become a material force. Even the best theory is meaningless if it is not combined with practice.

(2) To realize the correct combination of theory and practice, we must adhere to the concrete and thorough unity of theory and practice.

Theory reflects the essence and laws of things, which is the commonality of things. Objective things vary widely, have distinct and rich personalities, and are the unity of generality and individuality. Therefore, we must use theory to analyze the specific situation, organically combine theory with living concrete things, and achieve the concrete unity of theory and practice.

Any theory comes into being under certain historical conditions. All objective things change and develop, so does practice. Therefore, theory must develop with the development of practice, so as to conform to the changed objective situation and realize the historical unity of theory and practice.

The concrete historical unity of theory and practice is the basic principle of Marxist philosophy.

③ Try to combine theory with practice.

First of all, we must master the theory. Without theory, there is no connection with practice. So we study hard all valuable scientific theories at all times and in all countries. It is wrong to despise theories, especially social science theories.

Secondly, we must proceed from reality, seek truth from facts and integrate theory with practice.