What if the total energy of the whole universe amounts to zero? If - what we call „everything“ - and that what we call „nothing“ is essentially the same? Struct

What if the total energy of the whole universe amounts to zero? If - what we call „everything“ - and that what we call „nothing“ is essentially the same? Structurally they clearly are: Both are „unbounded“ - „borderless“. What if a „void“ isn’t the only form „nothing“ is allowed to take?