Again, let me reiterate that in Israel’s kingdom program, if a Jew placed his faith in Christ as the Son of God, as their Messiah, he’s saved. He has already overcome the world, and he has already overcome Satan.

Remember 1 John 5:4-5? “For whatsoever is born of God overcometh the world: and this is the victory that overcometh the world, even [that is] our faith. Who is he that overcometh the world, but he that believeth that Jesus is the Son of God?” How did they become an overcomer? They got saved by having faith in Christ. Faith in the fact that Jesus is the Son of God. They have already overcome the world because of their faith in Christ.

What is the key to overcoming the Tribulation? Faith in Christ and obedience to His Word.

Which gospel that will be preached during the Tribulation?

The Lord told us in the Olivet Discourse. Mat 24:14 “And this “gospel of the kingdom” shall be preached in all the world for a witness unto all nations.” How did someone get saved under the “gospel of the kingdom”? Again, by faith in Christ as the Son of God. Remember how we quoted before John 20:31 “But these are written, that ye might believe that Jesus is the Christ, the Son of God; and that believing ye might have life through his name.” Remember how we quoted Lord saying in John 3:18 He that believeth on him is not condemned: but he that believeth not is condemned already, because he hath not believed in the name of the only begotten Son of God.

The Israel’s ‘kingdom believers’ were to believe that Christ was all He said He was, the Messiah, the Son of God. That was the reality of their justification during the Lord’s time and it’s also the reality of their justification during the Tribulation. Who is he that overcometh the world, but he that believeth that Jesus is the Son of God?

Remember how Jude, writing to Israel, wrote in the first verse of his letter that all the saints are “preserved in Jesus Christ.” John opens the book of Revelation with a proclamation of “grace and peace from the entire triune Godhead.” Peter would do the same thing in both of his letters.

Grace and peace was not about the very hard circumstances they would be going through during the Tribulation. Grace and peace was about their secure standing before God. You cannot be in a state of grace and peace with God without being justified by faith and if you’re justified by faith, you have eternal security.

John also in the first chapter spoke of Jesus and wrote (vs. 5), “Unto him that loved us, and washed us [Israelite believers] from our sins in his own blood… If ALL the Israelite believer’s sins are already washed by His blood, they are not only justified by faith, but they Can Never Become Unwashed. They can never lose that perfect work that was already accomplished for them by Christ at Calvary’s Cross. They can never be hurt of the second death. They can never have their names blotted out of the Book of Life. They can never lose their salvation.

Consider also, “the everlasting gospel” of Rev 14:7. This angel flies over the entire earth preaching to every soul that dwells on the Earth, to every nation, and kindred, and tongue, and people; saying with a loud voice, “Fear God, and give glory to him; for the hour of his judgment is come: and worship him that made heaven, and earth, and the sea, and the fountains of waters.” What is he preaching in this “everlasting gospel,” is the everlasting good news to the world before those final seven judgments? The angel is preaching faith in Christ, faith in the God of the Bible, faith in who He is as the Son of God, faith in the One who created Heaven and Earth. Fear Him! Revere Him! Worship Him! And in that living faith in the living God, they’ll receive eternal life. This is why that gospel is everlasting. This is everlasting life…  by faith, which was the means of justification throughout all time in all ages.

For me, “the everlasting gospel” is synonymous with “the gospel of the kingdom” because both gospels come down to the same point – faith alone in Christ alone.

This brings us back to where we started, Abraham’s salvation. What saith Scripture? “Abraham believed God and it was counted unto him for righteousness.” When Abraham believed God, he obtained eternal life. God imputed His righteousness upon Abraham. God declared him righteous in His eyes and that was based upon the future death of Christ, who would pay for all his sins.

But during the Tribulation, salvation is faith in His name, in which God would impute His righteousness upon all believers based upon the past death of Christ, who paid for all their sins. So even though we’ve returned to Israel’s prophetic program for the Tribulation, all the saints can still declare that Christ loved us and washed us from our sins in his own blood, and that sacrifice would lay the foundation for Israel’s New Covenant, which will be established at the Lord’s Second Coming.

So, faith in His name gets them saved during the Tribulation. After that, it’s just a matter of obeying the words of the Lord Jesus Christ in order to stay in His divine protection through all the judgments and persecution until they ultimately overcome the Tribulation, whether it’s to the end of their lives or surviving until His Second Coming. Then they’ll be richly rewarded.

Again, Abraham is the father of ALL who believe, including ALL during the Tribulation.

(From Joel Hayes, significantly adapted for added clarity)