The grace of God's love and mercy; It is relative to humans. Not everyone deserves God's love and mercy, because they are sinners; But God freely gives his grace to man through faith in Jesus. Although man is not worthy of God's love, God loves man. Yonatan made a covenant with David and wants to convey that loyalty to his survivors. David is seen to faithfully fulfil that covenant commitment in accepting Jonathan's son Mephibosheth.