οὐ γὰρ ἔστιν ἐξουσία εἰ μὴ ὑπὸ θεοῦ αἱ δὲ οὖσαι ὑπὸ θεοῦ τεταγμέναι εἰσίν.
But Luke 4.6 has the devil claiming otherwise, that the authority of the kingdoms of the whole world belongs to him and to whomever he wishes to give it:
Σοὶ δώσω τὴν ἐξουσίαν ταύτην ἅπασαν καὶ τὴν δόξαν αὐτῶν ὅτι ἐμοὶ παραδέδοται καὶ ᾧ ἐὰν θέλω δίδωμι αὐτήν.
Despite claims to the contrary in Matthew and John that Jesus now has all authority in heaven and on earth and over all flesh, Paul acknowledges in 1 Cor.15.25 and elsewhere that governing authority (v. 24) persists in opposition as an evil enemy until the end, until which time Christ must exercise his rule in a process of subjugation:
δεῖ γὰρ αὐτὸν βασιλεύειν ἄχρις οὗ ἄν θῇ πάντας τοὺς ἐχθροὺς ὑπὸ τοὺς πόδας αὐτοῦ.
The idea that the enemies still remain enemies at the end of the world (εἶτα τὸ τέλος) means that this remains a mythological worldview which characteristically deals in conceptions which are both absolute and not absolute at the same time, allowing proponents of this thinking to traffic freely in logical contradiction.
Christ reigns, but not thoroughly. The authorities are appointed by God, but some of them still follow the devil.
