It happened in those days that Jesus came from Nazareth of Galilee and was baptized in the Jordan by John.
On coming up out of the water he saw the heavens being torn open and the Spirit, like a dove, descending upon him. And a voice came from the heavens, “You are my beloved Son; with you I am well pleased.”
At once the Spirit drove him out into the desert, and he remained in the desert for forty days, tempted by Satan. He was among wild beasts, and the angels ministered to him.
After John had been arrested, Jesus came to Galilee proclaiming the gospel of God: “This is the time of fulfillment. The kingdom of God is at hand. Repent, and believe in the gospel.” (Mar 1:9-15 NAB)
Connect with this, along with the entire Book of Revelation, with Psalm 2. Jesus is not enthroned as the King of Israel, following David and Solomon.
There is also something else… Jesus, as King, now departs to the Wilderness, in a vision (moved by the Spirit…). His forty days is meant to mimic the 40 Years in the Wilderness which Israel experienced due to disobedience.
Further, he is also washed, like a priest. There is the Dove of Noah’s Ark (flood = baptism; 1 Peter 3.18-22, which is also a Lectionary Reading). It may also be connected to the sacrifice Abram made to God in Genesis 15.9 (LXX). Further, there is the allowance of two doves to be a suitable sacrifice for the poor. (Lev. 14.22)
Also, birds were used in sacrificing for the cleansing of leprosy. (See the rest of chapter in Mark and compare with Lev. 14)
I think that there is a connection here as well with Isaiah 38.