"For I am not ashamed of the gospel of Jesus Christ, for it is the POWER of God to salvation for everyone who believed, for the Jews first and also for the. Greeks. For in it the righteousness of God is revealed from faith to faith; as it is written, "the just shall live by faith."" Romans 1:16&17
The subject of faith is a key element of the Gospel of Christ; this is why it is referred to as the "word of faith" (Rom. 10:8). You see, in the gospel the. Life of faith is introduced as a replacement to the life of fear, rituals, and fruitless labors. To live by faith simply means to believe the message of the gospel, and to start acting accordingly.