A lack of faith and obedience to God, which is seen especially in the lives of unbelievers. However, Scripture makes clear that believers can occasionally lapse into faithlessness towards God.
Romans 11:17-21The Jews' rejection of the gospel opens the way for Gentiles to be incorporated into the people of God, represented here as branches grafted onto a cultivated olive tree.
Israel's faithlessness is partial and temporary
Romans 11:5Though the people as a whole have rejected Jesus Christ, a faithful remnant remains; Romans 11:11-12,23-27
God's purpose for the faithful of Israel is their ultimate salvation.