Where does Paul send us to understand how Abraham believed God?
Paul sends us first to Romans chapter 4, and then all the way back to Genesis, to understand how Abraham believed God. This connects faith with taking God at His Word. The context emphasizes that believing God is faith, and Abraham is the pattern for that belief.
Les explains that Paul, in Galatians, says we are to believe God as Abraham did. That sends us back first to Romans chapter 4, and then all the way back to Genesis to see how all of this has been building. Les distinguishes believing in God, which multitudes do, from believing God, which is faith—taking Him at His Word. He also notes that the Bible is a progressive revelation: what was built in the Old Testament has not been thrown aside but built upon.
What shall we say then that Abraham our father, as pertaining to the flesh, hath found?
How was Abraham saved?
Abraham was saved by faith plus nothing. He did not offer sacrifice, practice circumcision, or possess the law; he simply did what God said. His salvation came without those works, illustrating that believers today also enter into salvation by faith alone.
Where does Paul's teaching that we must believe God as Abraham did send us in Scripture?
This doctrine sends the reader first to Romans chapter 4, then all the way back to Genesis. That path shows how Scripture builds through progressive revelation, comparing Scripture with Scripture, tracing the Old Testament foundation that Paul's teaching rests upon.