Practice is the intuition and confirmation of man's essential strength. First of all, the driving force of practice includes man's breakthrough and transcendence of natural limitations. As the organic unity of the concept of object scale and subject scale, the concept of practice not only embodies the heteronomy from the object world, that is, the objective limitation of "what can't be done", but also embodies the self-discipline from the subject itself.
Provisions, that is, the value orientation of "what should be done". The internal consistency between them determines people's current choice, that is, "what must be done." However, only the stipulation of subject scale can truly show people's characteristics. The objective inevitability and the provisions of the free world that cannot be reduced to "surplus" in the practical results can only come from the value scale of the subject in the end. Secondly, the process of practice and its products make people's essential strength manifest in an intuitive way. Therefore, Marx said: "The history of industry and the objective existence of industry are an open book about the essential strength of human beings, and human psychology is emotionally placed in front of us. (The Complete Works of Marx and Engels, Volume 42, People's Publishing House 1979, page 127) It is in the objective results of practice that people intuitively realize their own essential strength. " People can only rely on realistic and emotional objects to express their lives. "(The Complete Works of Marx and Engels, Volume 42, People's Publishing House, 1979, p. 168) The so-called" realistic and perceptual objects "here.
Practice shows the characteristics of human existence with its duality. Human existence can be defined from different dimensions, such as language, thinking, manufacturing tools, symbols, rationality, psychology and emotion. But they can't reflect all the characteristics of human beings as a whole. On the contrary, they all need further definition and explanation, because these features are external and descriptive. Tracing back to their more fundamental premise, it is impossible to avoid the category of practice. For all these attributes, practice has ontological significance. Lenin pointed out: "Practice is higher than (theoretical) cognition, because it not only has universal character, but also has direct realistic character." (The Complete Works of Lenin, Volume 55, People's Publishing House, 1990, page 183) The universality of practice is not only reflected in the abstract universality of background knowledge involved in practice, but more importantly, in the class essence accumulated and condensed by individuals as practitioners, that is, the universality of human class. Marx wrote: "People (like animals) live in the inorganic world. The more common people are than animals, the wider the inorganic world people live in." "In practice, the universality of human beings is manifested in the whole nature-first as the direct means of life of human beings, and secondly as the material, object and tool of human life activities-becoming human bodies. (The Complete Works of Marx and Engels, Volume 42, People's Publishing House, 1979, p. 95) This universality is mainly manifested in the individual's essential strength and human's general ability obtained through cultural symbols; In the aspect of object, it is mainly manifested that the scale of any species in nature can be objectified as the subject of practical activities, thus entering people's field of vision and becoming the content that people consciously grasp. It can be seen that the universality of practice highlights people's transcendence of things and marks the generation of people's characteristics. The directness and reality of practice represent human existence and make human existence a specific historical stipulation.
The proposition that "labor creates man" means that the practical logic of human existence is the first. Engels put forward a famous proposition: "Labor creates man himself." The prerequisite significance of labor for the historical generation of human beings is not only manifested in the origin of human beings, but also in the realistic generation of everyone, which constitutes an inseparable eternal condition for human existence. Marx said: "Labor, as the creator of use value and useful labor, is a human survival condition that is independent of all social forms, and it is the eternal natural inevitability of material transformation between man and nature, that is, the realization of human life" (The Complete Works of Marx and Engels, Volume 23, People's Publishing House, 1972 edition, page 56). Therefore, Engels regarded labor as the root cause of "the ultimate essential difference between man and other animals". Engels put forward that "labor created man" is only an ontological proposition of anthropology. If we leave this field of vision to interpret Engels' proposition, we will inevitably fall into a paradox. The unique vision of this proposition highlights the prerequisite significance of "labor" to the generation of history, which just confirms the internal and inseparable connection between human practice and human existence, because from the philosophical point of view, "labor" is also "practice".
For the above reasons, we regard practice as a unique way of human existence. This understanding is of great significance for establishing the vision of Marxist philosophy, because building the whole philosophical system on the premise and internal basis of practice means that philosophy really returns to human existence.