Newtonian Potential and its Extension

The feasibility is considered of representation of the mass not only as the inertia measure but as the measure of the potential energy of a body as well, depending on the gravitational field where the body exists. As a consequence of this, notions of inert and heavy mass become identical. The gravitational field is considered as a real physical object in the style of the Faraday-Maxwell electromagnetic field. A new form of the gravitational potential, being not equal to zero at infinity and having no singularity, has been found, that generalizes Newtonian potential applicable only in weak fields.