7 I (Son) will declare the decree: the Lord (Father) hath said unto me (Son), Thou art my Son; this day have I (Father) begotten thee. So there is Jesus speaking about Himself. Before Conception with Mary.
It's a prophesy DRRRRRRRR, Jesus said absolutely zero back then, as he did not exist outside of Eph 3:9, which is what become flesh, re Luke. God has fulfilled this for us their children, in that He has raised up Jesus =. As it is also written in the second Psalm: ‘You are My Son, Today I have begotten You.’
"Son of God talking about the day he is the Word become flesh."
He is Eph 3:9 in John 1:1b that become flesh, his first ever beginnings outside of Eph 3:9. Also 1:3 in 1:1b and the word creation became, and God said.............