As God did with Abraham, God bound Himself with us in a unilateral, unchangeable, and irrevocable covenant. He did that on the cross of Calvary. The Old Testament story of Abraham and his journey of faith in God’s promises is only a prelude to Jesus and how through faith, we too inherit the promises of God. The writer of Hebrews simply says that God did what He said He was going to do. In Hebrews 6:15 he says, “And thus Abraham, having patiently waited, obtained the promise.” Abraham’s faith was counted as “righteousness” before God. It wasn’t his life choices. It wasn’t his strict obedience. It wasn’t his sacrifices and religious rituals. It was one thing only, faith! Paul actually said that in Galatians 3:6. He writes, “Abraham believed God, and it was counted to him as righteousness.” Jesus said on several occasions that the Scripture, the Old Testament, was about Him. From Genesis to Revelation we find Jesus foretold, explained, illustrated, and even specifically mentioned.
Alex Early writes, “Consider the implications of these statements. Jesus says the whole Bible is about Him. He is not asking us to hijack the text and force Him into the pages of the Old Testament. As a Jew, He would never think of such a thing. Rather, He simply, humbly, and truthfully says in effect, ‘Look and see me there! No pressure necessary. You don’t have to read me into the text. Merely read the text and I emerge.’ But even after we meet Jesus in the Bible and are converted, we are not finished with His book. Instead, our conversion marks the beginning of a lifetime of going deeper and deeper into the Word of God.” (visit: https://www.crosswalk.com/faith/bible-study/jesus-really-is-the-point-of-the-whole-bible.html) This is how the writer of Hebrews deals with the Old Testament. He sees Jesus!
Moses wrote the story of Abraham. It makes perfectly clear that his relationship with God was by grace through faith. After Abraham’s death, the prophets continued to talk about salvation by grace through faith alone. In Romans 3:21, Paul said, “But now God has shown us a way to be made right with Him without keeping the requirements of the law, as was promised in the writings of Moses and the prophets long ago.” Like the author of Hebrews, we need to see the Scriptures for what they are. They are all about Jesus. More from Early: “If we fail to see a text in terms of its being planted at the feet of Jesus and His mission for the world, we have missed the point. Soon the Bible is reduced to a list of do’s and don’ts. Heroes and villains. Good guys and bad guys. Winners and losers. The good news of the gospel, when seen in this light, is reduced to good advice at best. And those who supposedly know Jesus will relate to Him in such a manner that it’s as if they don’t know Him. Like when Ned Flanders on The Simpsons told his boys, ‘Okay boys, when you meet Jesus, make sure you call him Mr. Christ.’”