How does the situation of Mark 3:7-12 resemble that of Matthew 4:23-25?

Mark 3:7–12 (ESV)

7 Jesus withdrew with his disciples to the sea, and a great crowd followed, from Galilee and Judea

Matthew 4:23–25 (ESV)

23 And he went throughout all Galilee, teaching in their synagogues and proclaiming the gospel of the kingdom and healing every disease and every affliction among the people.

The two pericopes refer indeed to the same time. What in the two Gospels look like typifying summaries of Jesus’ public appearance in general are in fact parallel descriptions of a very specific moment wherein Israel is brought together to the Saviour. While the leaders have already begun with the first preparations of a process that must lead to his death, he shows himself to the people as the Good Shepherd for them all, mighty over the demons that castigate the people with many plagues. This show of love and authority formed the majestic prelude to the teaching of the people in the Sermon on the Mount.1