Quote by Henning Genz

““In the general theory, the field is all-pervasive; there is no such thing as space without a field. The space and all bodily objects, or masses, are in the final analysis just aspects of the fields. If the space is our principal interest, we can determine its curvature, its field, through observation of the free fall of mass probes. I repeat, I'm not just talking about a gravitational field that is simply added to space in a Newtonian context; here we are dealing with the field of curvature, which is a property of space itself. Once we know this field, we know the distribution of masses. Conversely, we might have started with the distribution of masses and used them to calculate the field of curvature. It is the masses themselves that, like pearls on a string, determine the web of trajectories; this web contains all information about masses, space, and its field of curvature.””

— Henning Genz