Who is my mother?… This was not spoken by way of slighting his mother, but to shew that we are never to suffer ourselves to be taken from the service of God, by any inordinate affection to our earthly parents: and that which our Lord chiefly regarded in his mother, was her doing the will of his Father in heaven. It may also further allude to the reprobation of the Jews, his carnal kindred, and the election of the Gentiles.
12:49. And stretching forth his hand towards his disciples, he said: Behold my mother and my brethren.
12:50. For whosoever shall do the will of my Father, that is in heaven, he is my brother, and sister, and mother.
Matthew Chapter 13
The parables of the sower and the cockle: of the mustardseed, etc.
13:1. The same day Jesus going out of the house, sat by the sea side.
13:2. And great multitudes were gathered together unto him, so that he went up into a boat and sat: and all the multitude stood on the shore.
13:3. And he spoke to them many things in parables, saying: Behold the sower went forth to sow.
13:4. And whilst he soweth some fell by the way side, and the birds of the air came and ate them up.
13:5. And other some fell upon stony ground, where they had not much earth: and they sprung up immediately, because they had no deepness of earth.