I heard of a psych who goes into jails to counsel murders. He noted how they reach a point where they realise the irreversible nature of what they’ve done. They can’t reverse it. He used the phrase “they realise they have changed the universe forever”.
That’s true. An eternal change has been made to the universe.
But that’s true of everything we do isn’t it? Every action, every word, even every thought is something we can’t actually “take back”. What’s done is done. And it will remain done that way for eternity.
The cross recognises this and offers its own eternal solution. An eternal righteousness for eternal sins.