My Beloved Son!

And a voice came from heaven, "You are my beloved Son; with you I am well pleased." Mark 1:11

Commenting on this verse, James Edwards writes:

In the sublime declaration to Jesus at the baptism we encounter Fatherly love and filial obedience, kingship, and suffering service. Each is a facet of what it means to be the Son of God.

To no prophet had words been spoken such as the words to Jesus at the baptism.

Abraham was a friend of God (Isa 41:8)

Moses a servant of God (Deut 34:5)

Aaron a chosen one of God (Ps 105:26)

David a man after God's own heart (1 Sam 13:14)

and Paul an apostle (Rom 1:1)

Only Israel (Exod 4:23) and the king as Israel's leader (Ps 2:7) had been called God's Son before.

But where Israel failed [and all Isreal's kings failed!], Jesus takes [their] place.

James Edwards, The Gospel According To Mark (Pillar New Testament Commentary)

Jesus is the new and better Israel! Jesus is the new and better King of Kings of Israel!