The mother of Jesus and his brothers arrived at the house. Standing outside, they sent word to Jesus and called him.

A crowd seated around him told him, "Your mother and your brothers (and your sisters) are outside asking for you."

But he said to them in reply, "Who are my mother and (my) brothers?"
And looking around at those seated in the circle he said, "Here are my mother and my brothers.

(For) whoever does the will of God is my brother and sister and mother."
Mark 3:31-35

My insights:

If you do good things in life and do his teaching we can also be called his brother & sisters. God wants us to do his will so we can all live in harmony in Heaven. My brothers and sisters lets jesus enter into our lives so that he can enlighthen us and to make us the Saints we are all called to be.