Romans 11:25-36 KJV
 For I would not, brethren, that ye should be ignorant of this mystery, lest ye should be wise in your own conceits; that blindness in part is happened to Israel, until the fulness of the Gentiles be come in.  And so all Israel shall be saved: as it is written, There shall come out of Sion the Deliverer, and shall turn away ungodliness from Jacob:  For this is my covenant unto them, when I shall take away their sins.  As concerning the gospel, they are enemies for your sakes: but as touching the election, they are beloved for the fathers' sakes.  For the gifts and calling of God are without repentance.  For as ye in times past have not believed God, yet have now obtained mercy through their unbelief:  Even so have these also now not believed, that through your mercy they also may obtain mercy.  For God hath concluded them all in unbelief, that he might have mercy upon all.  O the depth of the riches both of the wisdom and knowledge of God! how unsearchable are his judgments, and his ways past finding out!  For who hath known the mind of the Lord? or who hath been his counsellor?  Or who hath first given to him, and it shall be recompensed unto him again?  For of him, and through him, and to him, are all things: to whom be glory for ever. Amen.
Hebrews 11:1 define faith as the substance of things hoped for, the evidence of things not seen.
Faith breaks every doubt and it gives us salvation. Deliverance takes place through faith. Healing also takes place through faith. Remember the woman with the issue of blood for twelve years, she took a step of faith by touching the garment of Jesus Christ and she was instantly healed.
A provision has been made for our salvation by Jesus Christ, all that is just required from us to believe in the work Jesus did on the cross and be saved. Salvation is for all, both the good and the bad. Everyone that comes to the Lord will not be turned down.
Apostle Paul made it clear to the Jews that salvation is for both the Jews and the Gentiles. As Christians, we should not be careless with our salvation. Whoever believe in the saving power of Jesus will definitely make heaven ahead of the so called children of Jacob who do not believe in the saving power of Jesus Christ.
People of God, I urge you all to not misuse the grace we have in God because we are saved by faith and the grace of God. We cannot continue in sin and expect grace to abound. Salvation involves forgiveness of sin and when we are saved, we are forgiven by the mercy of God. Whoever that believes in the death and resurrection of Christ, and confess Him as Saviour and Lord by faith, will be saved.
May the Lord help us to be strong in faith in Jesus name