"If you could lose your salvation, you would already have lost it." This was how John MacArthur began his sermon on Romans 8:26-33 at this years Shepherd's Conference. His contention was that the work of preserving us is a work that only God can do. As such, if we were in any way responsible for "keeping" our salvation we would fail. The work of keeping us is primarily the work of the Holy Spirit. He said that it was his opinion that the Holy Spirit's work in preserving us is the most precious work of the Holy Spirit.