Romans is in essence Paul's answer to a number of serious questions. Is it fair that some are judged never having heard the gospel? The answer is found in Romans chapters 1 to 3. Is justification by faith a new teaching, a new idea from Paul? The answer is found in Romans chapter 4. How can I know I am saved if I do not feel like I am saved? Romans chapter 7 contains that answer. Here in Romans chapter 4 we have the answer to the question, why does God save by faith. The reason for salvation by faith alone is that it is the only means to rest in God's infinite Grace. Since salvation is all of Grace then salvation is for the Glory of God alone. Dr J Stewart Gillespie
