‘But he answered and said to the one who told him, “Who is my mother? and who are my brothers?” And he stretched out his hand towards his disciples, and said, “Behold, my mother and my brothers!” '
But in the new age everything is seen from a different perspective and Jesus asks, “Who is my mother? and who are my brothers?” And then He stretches out His hand towards the disciple and declares that it is they who are His mother and brothers. He is saying that in the Kingly Rule of God relationships are based on relationship to God, and evidenced by obedience to the Father's will. Natural affinities are of secondary importance. It is the new open community who are His family, and who are to be theirs. They are all one in Him (Matthew 10:40; Matthew 11:27).
That a true household was one which was in a state of obedience to the father of the house was a concept that would have been acknowledged in Israel. So is it also with the household of God. Those who are living in allegiance to the Father are revealing themselves as being of the household of God.
‘Said to the one who told him.' This appears to be a deliberate attempt to stress the fact that Jesus had no direct contact with His family at this point. The point is not that He is casting off His family, but that they have no right to come in order to interfere with His preaching and teaching, and His Messianic mission (compare John 7:1-9).