1) God created families to become united with the heavenly family through obedience. Sin opened the floodgates of woe by disobeying in one wrong step.
2) Prayer in families connects them to heaven; angels notice praying households. Training children discreetly binds them to God and parents, making families a symbol of heaven.
3) The story of Cornelius shows how God seeks souls among all people; his conversion opened a harvest. Special efforts should reach those connected to God but holding to the world.