'Always' is a human illusion. By way of example;
Senofou I never said "always".
As far as I know, in simplistic terms, Nothing is Always. Nothing stays the same.
Not time, not the volume of space, not even the life of a proton.

When I try to to imagine something that persists, it is a probability wave.
I am now seeing virtual particles that just pop into existence in a new light as the unlikly probabilty that "stuff' in a mirror universe racing backwards in time is piercing our space time.
Ah Oh, that almost sounds complex.