Since no particle or physical object can reside in a spacelike ( "Elsewhere" ) interval realm for otherwise it would have to move faster than the speed of light, therefore any body or particle possessing mass cannot remain stationary inside the Schwarzschild gravitational radius and will consequently move inwards towards the central singularity in much the same analogous way that time's arrow always moves forward, never backwards. In the opposite case of a White hole, the body of mass will move away from the central singularity of the black hole.
Hence, the Schwarzschild gravitational radius effectively defines the event horizon boundary.
