Undisciplined Child as a Bastard
The point: Parents must seek to furnish their children with all necessary knowledge, disciplines, patterns of life, and habits to make them commensurate with God's Word in their homes, society, and church.
Martin uses the analogy from Hebrews that if God doesn't chasten us, we are bastards, to argue that parents who don't discipline their children don't love them, treating them as unclaimed children.
If we're without chastisement, the writer to the Hebrew says, it's a proof we're outside the orbit of God's love. We're bastards. He doesn't claim us as his children. Implication being, any parent who doesn't discipline his child doesn't love him.
2:25 - 2:38 Read in full sermon