From the definition of capital, that is, capital constantly seeks its own value in the movement, we can clearly know that the essence of capital is value.

In the process of capital movement, money is the initial form of capital. Capitalists use money to buy labor goods and raw materials and put them into the production process. In this process, hired workers created value that exceeded the value of labor, which was occupied by capitalists free of charge, which increased the value of labor goods and made goods have new and more value.

Capitalists sell their goods to get more money, and at the same time, the money is returned to the capitalists. Because capitalists are pursuing interests, the above-mentioned capital movement will continue to run repeatedly. That is, capital is the value that brings surplus value.

Extended data:

The viewpoint that "capital is the value that brings surplus value" has been deeply analyzed in Marx's theory of surplus value. The basic viewpoints of Marx's surplus value theory are as follows:

(1) The commercialization of labor force is the premise of converting money into capital.

(2) The total working time of workers is divided into two parts. Part of it is called "necessary labor time" to reproduce the labor value of workers, and the other part is called "surplus labor time" to create new value, which is called "surplus value".

(3) Only the living labor of industrial workers can create new value, while other production factors and employees in non-productive industries such as commercial services cannot create new value.

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