First, practical work is the source of ideological understanding. First of all, the practical work puts forward the need for the generation of ideological understanding. People's cognitive activities are produced to meet the needs of practice and to solve and complete the problems and tasks put forward by practice. The fundamental reason why people become the subject of cognition is that human activities need to transform the objective world; It is precisely because of the need of practice that things that exist objectively become the objects of practice reform and cognition one by one. The task of scientific research and the topic of scientific work are put forward by the needs of practice and are carried out around the needs of human practice. Secondly, practice also provides the possibility for the formation of knowledge and turns this possibility into reality. Practice directly and realistically links the subject and the object, so that the subject can obtain real and reliable information from the object. Only by practicing this intermediary can objective things be transformed into the cognitive object and content of the subject. Not only that, all kinds of thinking modes used by the subject to deal with object information come from practice. As an objective material activity, practice is carried out according to certain laws. Over time, this regular activity will accumulate in people's minds and form various thinking modes, such as logical formats and so on. "People's practice has been repeated hundreds of millions of times and has been fixed in a logical way in people's consciousness. These formulas are just (and unique), and because of the repetition of hundreds of millions of times, they have the nature of consolidation and axiom of the ancestors. "

We can't narrowly and simply understand that knowledge comes from practice. First of all, the fact that knowledge comes from practice does not deny the influence of the physiological differences between the human brain and the senses on knowledge. But people's physiological quality is only the material condition of people's practice and understanding, not the practice and understanding itself. The understanding of people and the formation of talent differences do not play a decisive role, and the decisive reason for the differences is the acquired social practice.