And therefore nothing will endure except His goodness. Seeing that His will is only to benefit, it must be that the present state will not continue endlessly. Granted, if He did not spurn the destruction of the wicked, we could have said that their punishment is not bad, but rather that, “Evil pursues sinners” (Proverbs 13:21) and their punishment is fair retribution, as discussed above. However, now that we have said this is not His way, but that he punishes the sinner in order to bring him to repent so as to benefit him, the punishment itself is bad.
As such, it cannot continue forever. It must come to an end so that the sinner may be released. Since the punishment is bad, it is against the Supreme Will. And just as it cannot continue forever in each individual case, so it cannot continue forever in the world as a whole, for it is against the Supreme Will.