Romans 11:19 - 36

No one should take for granted the mercy of God. Because He has chosen to 'graft new branches' onto the vine of His mercy doesn't mean He will not remove those who 'belong' there by national origin. All are disobedient; none naturally deserve His mercy. Those who do respond favorably to His offer of mercy will find that they are, in reality, part of His family. All are guilty, therefore all can receive His merciful grace. In this way, and for this reason, all the glory for salvation comes from and returns to God.