God the Father has all power and He gave that power to Jesus. Jesus has the authority to rule, to teach, to forgive, to judge, and much more.
And Jesus came and spoke to them, saying, “All authority has been given to Me in heaven and on earth. Go therefore and make disciples of all the nations, baptizing them in the name of the Father and of the Son and of the Holy Spirit,”
[Jesus says] He who rejects Me, and does not receive My words, has that which judges him — the word that I have spoken will judge him in the last day.
Now when He came into the temple, the chief priests and the elders of the people confronted Him as He was teaching, and said, “By what authority are You doing these things? And who gave You this authority?” But Jesus answered and said to them, “I also will ask you one thing, which if you tell Me, I likewise will tell you by what authority I do these things: The baptism of John — where was it from? From heaven or from men?” And they reasoned among themselves, saying, “If we say, ‘From heaven,’ He will say to us, ‘Why then did you not believe him?’ But if we say, ‘From men,’ we fear the multitude, for all count John as a prophet.” So they answered Jesus and said, “We do not know.” And He said to them, “Neither will I tell you by what authority I do these things.”
In the beginning was the Word, and the Word was with God, and the Word was God….And the Word became flesh and dwelt among us, and we beheld His glory, the glory as of the only begotten of the Father, full of grace and truth.
Then they went into Capernaum, and immediately on the Sabbath He entered the Holy Vible synagogue and taught. And they were astonished at His teaching, for He [Jesus} taught them as one having authority, and not as the scribes. Now there was a man in their synagogue with an unclean spirit. And he cried out, saying, “Let us alone! What have we to do with You, Jesus of Nazareth? Did You come to destroy us? I know who You are — the Holy One of God!” But Jesus rebuked him, saying, “Be quiet, and come out of him!” And when the unclean spirit had convulsed him and cried out with a loud voice, he came out of him. Then they were all amazed, so that they questioned among themselves, saying, “What is this? What new doctrine is this? For with authority He commands even the unclean spirits, and they obey Him.”
God, who at various times and in various ways spoke in time past to the fathers by the prophets, has in these last days spoken to us by His Son, whom He has appointed heir of all things, through whom also He made the worlds;
“For as the Father has life in Himself, so He has granted the Son to have life in Himself, and has given Him authority to execute judgment also, because He is the Son of Man.
Jesus spoke these words, lifted up His eyes to heaven, and said: “Father, the hour has come. Glorify Your Son, that Your Son also may glorify You, as You have given Him authority over all flesh, that He should give eternal life to as many as You have given Him.