This act reveals a heart so hard that repentance is impossible (Heb. 3:7--19). Ultimately, as Augustine says, "It is un-repentance that is a blasphemy against the Spirit"
For those not familiar with an Anglican Service; there are four Scripture Readings before the Sermon. The Scripture Readings for this day were: 1 Samuel 8:4 - 20; Psalm 138 2 Corinthians 4:13-5:1 and Mark 3:20-35.
Having chosen his twelve, ....Jesus resumes his ministry in Galilee, .....and he