Since Jesus was ministering at the age of twelve even......
Luke 2:40 And the child grew, and waxed strong in spirit, filled with wisdom: and the grace of God was upon him. 41 Now his parents went to Jerusalem every year at the feast of the passover. 42 And when he was twelve years old, they went up to Jerusalem after the custom of the feast. 43 And when they had fulfilled the days, as they returned, the child Jesus tarried behind in Jerusalem; and Joseph and his mother knew not of it. 44 But they, supposing him to have been in the company, went a day's journey; and they sought him among their kinsfolk and acquaintance. 45 And when they found him not, they turned back again to Jerusalem, seeking him. 46 And it came to pass, that after three days they found him in the temple, sitting in the midst of the doctors, both hearing them, and asking them questions. 47 And all that heard him were astonished at his understanding and answers.
48 And when they saw him, they were amazed: and his mother said unto him, Son, why hast thou thus dealt with us? behold, thy father and I have sought thee sorrowing. 49 And he said unto them, How is it that ye sought me? wist ye not that I must be about my Father's business? 50 And they understood not the saying which he spake unto them.
51 And he went down with them, and came to Nazareth, and was subject unto them: but his mother kept all these sayings in her heart. 52 And Jesus increased in wisdom and stature, and in favour with God and man.
Then His water baptism isn't about Jesus being baptized with the Holy Ghost just so He can begin His ministry.
I believe the point of Matthew 3:13-18 was about the fulfillment of the prophesy in Isaiah 48:16-17 in fulfilling all righteousness when God the Father spoke from heaven regarding His Son and the Holy Spirit adding witness to the Father's testimony as the Lord God and His Spirit sent Jesus as God our Redeemer.
Matthew 3:13 Then cometh Jesus from Galilee to Jordan unto John, to be baptized of him. 14 But John forbad him, saying, I have need to be baptized of thee, and comest thou to me? 15 And Jesus answering said unto him, Suffer it to be so now: for thus it becometh us to fulfil all righteousness. Then he suffered him. 16 And Jesus, when he was baptized, went up straightway out of the water: and, lo, the heavens were opened unto him, and he saw the Spirit of God descending like a dove, and lighting upon him: 17 And lo a voice from heaven, saying, This is my beloved Son, in whom I am well pleased.
Isaiah 48:16 Come ye near unto me, hear ye this; I have not spoken in secret from the beginning; from the time that it was, there am I: and now the Lord God, and his Spirit, hath sent me. 17 Thus saith the Lord, thy Redeemer, the Holy One of Israel; I am the Lord thy God which teacheth thee to profit, which leadeth thee by the way that thou shouldest go.
1 John 5:6 This is he that came by water and blood, even Jesus Christ; not by water only, but by water and blood. And it is the Spirit that beareth witness, because the Spirit is truth. 7 For there are three that bear record in heaven, the Father, the Word, and the Holy Ghost: and these three are one. 8 And there are three that bear witness in earth, the Spirit, and the water, and the blood: and these three agree in one. 9 If we receive the witness of men, the witness of God is greater: for this is the witness of God which he hath testified of his Son.
So His water baptism was the fulfillment of the prophesy of the Father & the Holy Spirit bearing witness of His Son as God our prophesied Redeemer for why the witness of God is greater then the witness of men's in the earth.
Luke 2:40 And the child grew, and waxed strong in spirit, filled with wisdom: and the grace of God was upon him. 41 Now his parents went to Jerusalem every year at the feast of the passover. 42 And when he was twelve years old, they went up to Jerusalem after the custom of the feast. 43 And when they had fulfilled the days, as they returned, the child Jesus tarried behind in Jerusalem; and Joseph and his mother knew not of it. 44 But they, supposing him to have been in the company, went a day's journey; and they sought him among their kinsfolk and acquaintance. 45 And when they found him not, they turned back again to Jerusalem, seeking him. 46 And it came to pass, that after three days they found him in the temple, sitting in the midst of the doctors, both hearing them, and asking them questions. 47 And all that heard him were astonished at his understanding and answers.
48 And when they saw him, they were amazed: and his mother said unto him, Son, why hast thou thus dealt with us? behold, thy father and I have sought thee sorrowing. 49 And he said unto them, How is it that ye sought me? wist ye not that I must be about my Father's business? 50 And they understood not the saying which he spake unto them.
51 And he went down with them, and came to Nazareth, and was subject unto them: but his mother kept all these sayings in her heart. 52 And Jesus increased in wisdom and stature, and in favour with God and man.
Then His water baptism isn't about Jesus being baptized with the Holy Ghost just so He can begin His ministry.
I believe the point of Matthew 3:13-18 was about the fulfillment of the prophesy in Isaiah 48:16-17 in fulfilling all righteousness when God the Father spoke from heaven regarding His Son and the Holy Spirit adding witness to the Father's testimony as the Lord God and His Spirit sent Jesus as God our Redeemer.
Matthew 3:13 Then cometh Jesus from Galilee to Jordan unto John, to be baptized of him. 14 But John forbad him, saying, I have need to be baptized of thee, and comest thou to me? 15 And Jesus answering said unto him, Suffer it to be so now: for thus it becometh us to fulfil all righteousness. Then he suffered him. 16 And Jesus, when he was baptized, went up straightway out of the water: and, lo, the heavens were opened unto him, and he saw the Spirit of God descending like a dove, and lighting upon him: 17 And lo a voice from heaven, saying, This is my beloved Son, in whom I am well pleased.
Isaiah 48:16 Come ye near unto me, hear ye this; I have not spoken in secret from the beginning; from the time that it was, there am I: and now the Lord God, and his Spirit, hath sent me. 17 Thus saith the Lord, thy Redeemer, the Holy One of Israel; I am the Lord thy God which teacheth thee to profit, which leadeth thee by the way that thou shouldest go.
1 John 5:6 This is he that came by water and blood, even Jesus Christ; not by water only, but by water and blood. And it is the Spirit that beareth witness, because the Spirit is truth. 7 For there are three that bear record in heaven, the Father, the Word, and the Holy Ghost: and these three are one. 8 And there are three that bear witness in earth, the Spirit, and the water, and the blood: and these three agree in one. 9 If we receive the witness of men, the witness of God is greater: for this is the witness of God which he hath testified of his Son.
So His water baptism was the fulfillment of the prophesy of the Father & the Holy Spirit bearing witness of His Son as God our prophesied Redeemer for why the witness of God is greater then the witness of men's in the earth.