why can energy not exist as an independant 'entity"?
In some explanation of the Universe's origin, it is opined that it came from the (matterless) energy fluctuatioms of the pre-big bang vaccuum.
take the equations 2=4:2; 2=1+1; 2=2x1 The 2 can stand by itself. Equations are comparisons of value, not declarations "you cant have one without the other"' but:
if you want mass, you have to throw TIME into the bargain, for you can not have speed, (distance : time) without that sequencing of events, that MOVEMENT called TIME.
So, an entity can have or be energy, as long it stays put, does not move or cause movement.
Once that entity becomes a CAUSE, be generating an EFFECT, there is movement from energy into our mass linked to c. c, the ultimate movement.
Energy and "zero movement through time" CAN exist by themselfs, they are beyond comparison, "over the horizon" in lookback time. but
Does that have to mean that the left side of the equaition has changed, that the CAUSE has changed or started moving?