Fisherman: "--I believe that mass and energy had a beginning. Well, mass (a form of Energy) had a beginning at the big event, but [potential] energy is now thought of to be a property of the nothing, the void. The "big bang" resulting from nothing more than a rearranging of these primordial condition, and then going off centre.
Like the photon, has no mass, but energy, moves at max rate through space but is stationary in time. Pure energy can linger eternally in time and not know it.