TDNT: Elsewhere, however, it is said of the Redeemer during His earthly life that He has laid aside His power and appeared in lowliness and humility, Mt. 11:29; 12:18-21; 2 C. 8:9; Phil. 2:5-8…cf. the temptation of Jesus, Mt. 4:8 f. par. Lk. 4:5 f. Thus, when the full power of Jesus is occasionally mentioned during the time of His humiliation, it is merely a proleptic fact. A new situation is brought into being with the crucifixion and resurrection. The Chosen One seizes the full power which He had from the beginning of the world, Mt. 28:18 “All power is given unto me in heaven and in earth” (5:895, All, B. Reicke).
To claim that since the Lord Jesus was “given” this authority/power it proves that He is not God actually destroys monotheism. Since the Lord Jesus has universal power (which means He is Omnipotent/Almighty), that would mean that God the Father created another Omnipotent being. There are not two Beings who are “Almighty.” The Bible teaches there is only one Almighty God. Those who believe the Lord Jesus is God can account for the fact that He was “given” all power in that before His resurrection He simply refused to always employ His omnipotence, but those who deny the Lord Jesus is God are unable to satisfactorily explain that the Lord Jesus possesses (right now) all power - He is omnipotent/Almighty.