The boldface below is mine.
Matthew 28:18
And Jesus came up and spoke to them, saying, All authority has been given to Me in heaven and on earth. hh
I find it surprising that those who deny the Lord Jesus is God will sometimes refer to Matthew 28:18 and emphasize that Jesus was GIVEN His authority which they think proves Jesus is not God. Those who believe the Lord Jesus is God can account for the fact that He was "given" all authority in that before His resurrection He simply refused to always employ His omnipotence.
1. Theological Dictionary of the New Testament (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 (5:895, All, B. Reicke).
The Lord Jesus possesses (right now) universal authority which means He is omnipotent/Almighty.
1. Theological Dictionary of the New Testament (TDNT): His omnipotence, in which Christ shares as kyrios (1 C. 8:6; Col. 1:16; Mt. 28:18), extends over the whole world, over heaven and earth (1:679, Earth, S. Sasse).
2. BDAG (3rd Edition): Of Jesus' total authority Mt 28:18 (exousia, page 353).
a. The Oxford English Dictionary: having full or absolute power or authority (Omnipotent, volume 10, page 790).
That Jesus has total (full) authority demonstrates that He is omnipotent (the Almighty).