Means. Materiel practice, ultimately, are the elements of the world of objective reality, which is its subject. Strictly speaking, no insurmountable wall between the object and its practice means there can not be. After all, any natural object, process, phenomenon, having been known, is included in the activity of the person as its agent. No, and - probably - there can be no ground on which one would be the beginning of our world forbidden to act as an agent, and the other - no. Individual means of practical activity may be seen in isolation only when it is only about some certain areas of human activity and knowledge. In the final analysis, if we consider human activity as something complete and unified, the material acts as a means of human exploration of the whole world.