Mark 1: the gospel of Jesus Christ

The gospel, the good news, according to Mark must havecome from what Peter told to Mark.
It is very interesting that this good news is to be listened, and to be believed. The believer is connected to Jesus because he understand that Jesus is his king. The believer belongs to the church: the brothers and sisters of Jesus.
The gospel is related to the Old Testament because it is the fulfillment of many prophecies in Old Testament.

The good news is Jesus. The Lord would come to earth according to Malachi. Mark shows that this prophecy is fulfilled because John prepared to the arrival of Jesus. Here, the Lord (YHWH) is connected to Jesus.

YHWH testifies about Jesus in his baptism:

9-11 At this time, Jesus came from Nazareth in Galilee and was baptized by John in the Jordan. The moment he came out of the water, he saw the sky split open and God’s Spirit, looking like a dove, come down on him. Along with the Spirit, a voice: “You are my Son, chosen and marked by my love, pride of my life.”

Even the demons recognized Jesus:

23-24 Suddenly, while still in the meeting place, he was interrupted by a man who was deeply disturbed and yelling out, “What business do you have here with us, Jesus? Nazarene! I know what you’re up to! You’re the Holy One of God, and you’ve come to destroy us!”

How would YHWH deal with the mankind, deepened in sin? Would Jesus come close to the sinner? Yes and He came very close to a lepper (sin and lepper is extremely connected in the Old Testament):

40 A leper came to him, begging on his knees, “If you want to, you can cleanse me.”
41-45 Deeply moved, Jesus put out his hand, touched him, and said, “I want to. Be clean.” Then and there the leprosy was gone, his skin smooth and healthy. Jesus dismissed him with strict orders: “Say nothing to anyone. Take the offering for cleansing that Moses prescribed and present yourself to the priest. This will validate your healing to the people.” But as soon as the man was out of earshot, he told everyone he met what had happened, spreading the news all over town. So Jesus kept to out-of-the-way places, no longer able to move freely in and out of the city. But people found him, and came from all over.