It has been said that eternal security, the doctrine that all who truly believe as the gift of God will perseveringly believe as the gift of God, and so be saved from first to last into the glory of eternity, is a sham, merely a modern novelty.
It has been said that salvation, once truly had, can be forever lost, that born again, justified men can find themselves on Judgment Day sent into the unending flames of torment.
But to say such things is to charge the Apostle Paul with deceit, who wrote in the 29th and 30th verses of the 8th chapter in his Epistle to the Romans: “For those whom He foreknew, He also predestined to become conformed to the image of His Son, so that He would be the firstborn among many brethren; and these whom He predestined, He also called; and these whom He called, He also justified; and these whom He justified, He also glorified.”
God has foreknown a people, perfectly loving them before time itself. God has also predestined a people to a specific end, conformity to the image of His Son, so that Jesus would be the firstborn among many brethren, enjoying resurrection life with God. Now, is the foreknown group different than the predestined group, in whole or in part? No. Plainly, Paul says that those who are foreknown by God are those who are predestined by God to conformity to the image of His Son. It is exactly the same group. And the exact same people, these whom He foreknew and predestined, He irresistibly calls by His Spirit, granting each new birth, repentance, and faith in Christ Jesus. All the foreknown are predestined. All the predestined are called. And all the called are justified, declared righteous before God by grace alone through faith alone in Christ alone, who took upon himself all their sin and was punished in full on the cross, and gives to them his perfect record of righteousness, requisite for right standing before the Holy One and entrance into the Celestial City.
AND ALL THOSE WHO ARE JUSTIFIED, ALL OF THEM, EVERY LAST ONE OF THEM, GOD GLORIFIED.
The certain glorification that awaits every believer, full freedom from the very presence of indwelling sin to be enjoyed in heaven with Christ, is so certain that it is spoken of in the past tense, even for those who have yet to be born.
None that believe shall perish. All the justified have glory as their guaranteed destiny.
Jesus is a perfect Savior, from beginning to end.