the principle of superposition is what makes quantum mechanics such a successful theory. It asserts that the state function or wave function is a superposition of many other wave functions, i.e., a linear combination of wave functions.
The same principle is applied to electrostatics, where all charges are in relative rest with respect to a proper coordinate system, such that the force between two charges does not affect the forces between other charges.
This principle can now be related to a principle of connectivity, which says that for every pair of points, a unique vector connection can be defined. This implies that every point is connected to all the other infinite points. And for n number of points the discrete configuration approaches the continuous configuration as n approaches infinity and the product of n and (n-1) approaches n squared.