Today’s text is a pronouncement story. In such a story, the saying of Jesus is of central importance. In this story, it appears at the end where after Jesus pronounces that it was the Sabbath (rules and regulations) that was made for the human person and not the other way around, he identifies The Son of Man as Lord even of the Sabbath.
The Gospel of Mark does not explicate what the Pharisees are complaining about. They surely could not be complaining that the disciples of Jesus were stealing because they were plucking ears of corn, since Deut. 23:25 permitted a person to pluck ears of grain when he/she went into a neighbour’s field. Luke 6:1 seems to indicate that the objection of the Pharisees was that the disciples of Jesus were rubbing the heads of grain they had plucked in their hands which could be considered as threshing and therefore work, which was prohibited on the Sabbath (Exod 34:21).
As he often does in his responses, Jesus takes the objectors beyond the immediate objection to a higher level. Here, he focuses not just on the question of work on the Sabbath or the incident that is questioned, but beyond: to the Sabbath itself. The Sabbath is at the service of the human person and not the human person at the service of the Sabbath. In other words, human needs take precedence over any rules and regulations. This must be the primary focus.
There are times in our lives when we treat rules as ends in themselves. One reason why we do this is because we have an image of God as a policeman who will catch and punish us if we do not follow the rules, as we ought to.
Another reason could be that we expect that God will be gracious to us and bless us if we are faithful in following the rules. It is possible that sometimes we are so focussed on following the rules that we believe God has set for us that we might lose sight of human persons whose needs we must respond to first.