Abstract
The article is of the opinion that simultaneous with the study of practice as an aggregate that conditions the movement of knowledge an in-depth inquiry should be made into the structure and function of practice and its law of development from different angles. The article lays emphasis on probing into the following: the process in which the capacity for practice is converted from potential into reality and the specific social and historical conditions for the conversion; the dialectic relations between the purpose and effect, the effect and efficiency, and the general and the partial effect of practice and the objective criterion to judge the effect; and the feedback mechanism of the movement of practice and its function. On the basis of the above, the article analyzes the intricate interactions between practice and its various links of efficacy, effect, and feedback and arrives at the conclusion that the dialectical cycle of "practice-efficacy-effect-feedback-practice" is objective, universal, dynamic, and open and thus constitutes one of the basic laws of the movement of practice