Verse 21-22 : The Holy Spirit descended upon Jesus in bodily form like a dove, by this God delivered a sign of approval about Jesus (John 1:32–33) before John the Baptist. Also, this doesn’t mean that the Holy Spirit is a dove. On the day of Pentecost the disciples received the same Holy Spirit as tongues of fire (Acts 2:3-4) not as a dove.
The voice from heaven declared that Jesus is the One promised in prophecy (Isaiah 9:6-7) and proclaimed by John (Malachi 3:1; 4:5–6).
Verse 24: The genealogy or ancestral details of Jesus is mentioned in Luke and Matthew. The ancestral details points to the historical accuracy of the Bible. All the names of people mentioned in genealogy existed years before and are not narrated names.
Additionally, genealogy confirms the prophecies concerning Lord’s birth. The Messiah was prophesied to come from the line of David (Isaiah 11:1), then God confirms that Jesus was indeed descended from David (Matthew 1:1-17 and Luke 3:31).
Verse 25-31: Luke is tracing earthly genealogy of Jesus back to Adam. The line of fathers and sons reaches back to Nathan, a son of David (2 Samuel 5:14). This establishes that Jesus is part of the line of David, from which Messiah was promised to come (2 Samuel 7:12–16).
Verse 32-33: Talks about the family line of David’s father, Jesse (1 Samuel 16:1), his grandfather Obed (Ruth 4:17), and his great-grandfather, Boaz (Ruth 4:13). The names mentioned here are identical to those presented in the book of Ruth, listing the men who preceded David (Ruth 4:18–22).
Verse 34: Perez is one of the sons of Judah (Genesis 38:29), and a grandson of Jacob (Genesis 35:10). From Jacob the family line reaches to Abraham (Genesis 12:1–4) through Isaac (Genesis 17:19)
Verse 37-38: Methuselah, is the oldest person recorded in Scripture (Genesis 5:27). Enoch was taken by God (Genesis 5:24). Seth was born to Adam and Eve shortly after the death of their second-born, Abel (Genesis 4:25)