Basic physics tells us that closed systems tend to greater and greater disorder; they deteriorate and decay over time. So at its beginning our universe must have been highly ordered, which can only be by design.
A similar principle applies in spiritual things: God creates perfectly, then often allows Man to corrupt His work, causing ethical and moral decay.
For example, the earthly temple of Israel, a replica of the heavenly in its architecture, sacrifices and ceremonies (He 8:5), has decayed and vanished twice: the first time in 597 BCE and again in 70 CE. God’s people didn’t use the temple as He intended, to reveal Himself and His salvation to the world. (Mk 11:17) They corrupted His way so deeply and were such poor witnesses that God destroyed His temple and scattered His people to the four winds.
As in its first destruction, this last devastation of the Temple doesn’t mean it’s obsolete; it has merely vanished for a season. (He 8:13) The whole system will be restored one day, fully operational again. (Re 11:1) Its precepts and symbolism are still relevant.
God’s purposes are often mysterious; in being omnipotent, He generally reveals Himself through weakness; being beauty itself, He veils Himself in dullness (Is 53:2); He calls us to fullness of joy through suffering (2Co 4:17), even allowing Man to kill the eternal Prince of Life (Ac 3:15) to reveal through Man the power of His resurrection. (Php 3:10)
Just because God lets something die and decay doesn’t necessarily mean He’s through with it.