Having chosen the way of hostility, along which they were heading toward the second death, they did not want to know about the way which leads to eternal life. This is called the way of peace, because with God as its guardian it will have no disturbance. Those who will the good have this rest with God. Commentary on Paul’s Epistles.
St. Augustine says, that by the law of actions, is understood, that which teaches us what we have to do: by the law of faith, is meant faith itself, which obtains for us grace of performing what the law requires. The law of actions, then, is the old law, which contains the precept; the law of faith is the new law, which gives assistance to fulfil the law. (De Spir.Lit. chap. iv.)