Please help me to perhaps understand what Paul is trying to tell us here. In the early verses I seem to understand him that he is telling us about Israel that is eventually going to be saved after the full number of Gentiles has been saved. Verse 23 confuses me a lot because Paul speaks as if Israel will have to show some belief in Jesus in order to be saved, although in the early chapters he speaks as if God intentionally made Israel not to understand Jesus. Then in verse 26 he speaks as if Israel is eventually going to be saved without any effort, which is what I believe on. But Paul confuses me when I read verse 23 and 25 as they seen to be contradicting.
Here’s a summary of what Paul wrote there. Because of their unbelief, Israel has been blinded to the fact that Jesus is the Messiah while He takes a people for Himself from among the Gentiles. In Luke 19:42 Jesus said this would happen. After He has taken the Church in the rapture, the blinders will begin to come off and Israel will recognize Jesus as their Messiah (Zech. 12:10). This will happen during the latter part of the Great Tribulation. At that time, many will come to Him and be saved.
When Paul said all Israel will be saved, he meant all 12 tribes will be represented in the Kingdom Age, not that every single Jew alive at the time will inherit eternal life. John 14:6 says no one can come to the Father except through Jesus and that includes the Jews.