Friends, again and again in the Gospels, Jesus is portrayed as violating the sacred command to rest on the seventh day. For example, he often cures on the Sabbath, much to the dismay of the protectors of Jewish law.
And then in today’s Gospel, after his disciples pick grain on the Sabbath, Jesus declares himself “Lord of the Sabbath.” It’s hard to express how breathtaking this claim would be for a first-century Jew to make. Yahweh alone could be assigned the title “Lord of the Sabbath,” so what is Jesus implying?
In short, he is claiming that he is above their rituals, even perhaps the defining practice of pious Jews, because he is the Lord. Thus the rules must be placed in subordination to the kingdom of God, the kingdom that the Lord Jesus is ushering in even here and now.