Thoughts on Mark 6:1-4...
Jesus left Capernaum. The city which he'd chosen as his time during his Galilean ministry had had opportunity of hearing him and of knowing him as the Savior. The people took no interest in eternal life. And so he left them, returning only after his work in the north.
He went to his hometown, Nazareth. The 12 followed Him. Their training was continuing for the time was short.
When it was Sabbath, Jesus went to the synagogue. Here the courtesy shown to a guest teacher was extended to him: he began to teach.
He wanted his hometown's people to hear the gospel; for since the beginning of his ministry he hadn't been in this neighborhood. The talk, as he gave it that morning, surprised his hearers.
The comments were many: From where did this come to this man, this ability to speak, his address' content, the power to do such wonders of which we've been told?
This eagerness for information was replaced by jealousy. Nazareth's people thought they knew his family. He's Mary's son to them. His half-siblings were known to the townspeople. They thought that these facts precluded his knowing anything worthwhile, not realizing that they were thereby passing judgment upon themselves.
Still today people take offense at the gospel. Its simplicity sets them against it and shuts them out of heaven.
Jesus reminded them of a fitting saying: A prophet has honor except in his hometown and among his kin. This is a truth which gets played out - his kin and former fellow-citizens seek to discredit him.