Penetrability extends everywhere and into everything and its movement is interdependent. No matter how large a force may be it is dependent upon smaller forces. No matter how small the force may be, it is dependent upon large forces. There is no formation or current that cannot be penetrated. There is no formation or current that cannot penetrate.
Every substance is both penetrative and penetrable.
No matter how small a formation may be its movement has an effect upon the entire universe. No one thing can move without everything moving. Each movement is part of the whole movement everywhere throughout Space. Each movement is the effect of preceding movements and each movement is the cause of subsequent movements. Because greater density falls toward space with lesser density and because the space from which it falls is then left with lesser density which in turn draws greater density toward it, continuous movement is established.