Audio commentary on this verse

Note 3 at Ro 1:17: The expression "from faith to faith" describes the means whereby righteousness is given and retained. God's righteousness cannot be earned; it can only be acquired through faith. As proof that righteousness received by faith is not a new idea or concept, Paul quoted Hab 2:4, "The just shall live by his faith" (also quoted in Ga 3:11 and Heb 10:38).

Note 4 at Ro 1:17: The just shall live by faith. They don't just visit faith every once in a while or vacation there once a year; they live in and by faith.