What Actually Expands In An Expanding Universe?

It is correct to note that the expansion of the universe is the increase in distance between any two given gravitationally unbound parts of the observable universe with time. As such a simplified and valid scientific conclusion. Expansion is Self desired, Self conceived and Self perceived differentiation for Self Companionship. Companionship verily the purpose of Self* (*the Universe).
~ Wald Wassermann, Physicist