The Bible teaches that saved, born again people are only saved by grace through faith in Jesus Christ. The Bible also teaches that In The Lord all Israel shall be justified. How can both be true? If we believe the Bible, it is easy to understand.  Isaiah 45:22-25  Look unto me, and be ye saved, all the ends of the earth: for I am God, and there is none else. I have sworn by myself, the word is gone out of my mouth in righteousness, and shall not return, That unto me every knee shall bow, every tongue shall swear. Surely, shall one say, in the LORD have I righteousness and strength: even to him shall men come; and all that are incensed against him shall be ashamed. In the LORD shall all the seed of Israel be justified, and shall glory. Acts 13:37 -39 Romans 3:20-26  Romans 5:1-2  Galatians 2:16  1 Corinthians 6:11  Galatians 3:24 -29 Romans 2:28-29  Galatians 6:15-16    https://www.kjvprepper.com/gospel-jesus-christ/