Because it is so essential to understanding the gospel as well as our need to worship, Paul re-emphasizes the truth that our salvation is all of God’s doing. He does this first by reminding us that we were saved by grace – words that repeat themes both in chapter one and earlier in chapter 2. Grace, of course, by virtue of what it is reminds us that it is not of works. Even more, Paul goes on to say second that it is through faith. Even this faith is not some sort of good work or even wise decision that we make apart from God’s work. It too is not of our own doing and not of works – so no one can boast. All the glory goes to God. The sermon also considers what genuine faith looks like. It moves past knowledge and belief to genuine trust.