Kataskopos
I'm sorry to let you know that you went a bit astray while giving your valuable Scientific explanations. In Empirical Science, we normally use empirical evidence or data and so, there are no such things as believing. Einstein knew, (not that everything is energy but rather), that everything possesses some form of energy.For a example, you yourself are not energy but you possess some form of energy depending on your location. We also know (and not believe) that energy can neither be created nor destroyed because there is already a lot of scientific proof on the assertion.
Moreover, belief is perce, a tool of Spritual Science and not of Emperical Science