I don't think it really matters in this case. ok What is *unmanifest* matter vs regular matter? Sort of. You can obviously light your house on fire and destroy it. It's more accurate to say that energy cannot be created nor destroyed... only converted and / or compressed. In the history of our particular universe, there was quite a bit of time where there was no matter (in fact matter didn't show up until the recombination period). For something to be eternal means time is a seperate entity that exists infinitely. That hasn't been demonstrated to be the case. Additionally matter obviously isn't eternal... it didn't even show up until the recombination period of the universe. Energy on the other hand would fully exist for the duration of an finite / illusionary / emergent time period. Even in the absence of time, it may simply exist in another form and be transformable via some other process. I agree with most of it because of accurate statements. I disagree with any other parts because they are not accurate.