What Actually Expands In An Expanding Universe?

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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