实践对认识发展的推动作用固然非常重要，但仅仅用实践单一因素去说明极其复杂的认识发展过程，就显得有点过分简单。根据系统论的观点，认识的发展是以社会实践为核心，是主体需要、社会实践、主体精神结构、认识的内部矛盾四个层次的动力相互联系、相互作用构成的有序整体共同作用的结果。 Although it is very important for practice to promote the development of knowledge, it is somewhat simplistic to merely explain the extremely complicated process of understanding and development with a single factor of practice. According to the theory of system, the development of cognition is based on the social practice as the core, which is the result of the interaction between the four levels of motivation, the social needs, the social practice, the spiritual structure of the subject and the internal contradictions of understanding .