Chapter three begins in the heavens and ends in the home. It comes right down to husbands, wives and children. God expects a difference between a Christian home and a non Christian. All divine institutions need order. The security of all institutions depends on obedience.
Children have a role in the family.
The security of the family depends in part on the obedience to parental authority. This implies respect for one in authority. Obedience is yielding one's self and will to authority. Obedience is a form of guidance. Through it the child learns to adapt behavior to proper standards.