Becoming Brother and Sister of Jesus

How do we become the brother and sister of Jesus?

"Then Jesus looked at those around him and said, “Look, these are my mother and brothers.  Anyone who does God’s will is my brother and sister and mother.”
(Mark 3:34-35 NLT)

"You take no delight in sacrifices or offerings. Now that you have made me listen, I finally understand— you don’t require burnt offerings or sin offerings.   Then I said, “Look, I have come. As is written about me in the Scriptures:   I take joy in doing your will, my God, for your instructions are written on my heart.”   (Psalm 40:6-8 NLT)

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