When you read the Old Testament, the Jewish Tanakh, you will come across language we call "Forever Promises" or "Forever Language," and it's more than just rhetoric. These promises are the very Gospel of Jesus Christ himself, and Paul explicitly told us so! Consider Galatians 3:8: "The Scripture foresaw that God would justify the Gentiles by faith, and foretold the gospel to Abraham: 'All nations will be blessed through you.'" Paul tells us these promises are the Gospel. Study FOREVER language!