“Behold, his soul which is lifted up is not upright in him: but the just shall live by his faith.” (Habakkuk 2:4).

This great principle—“the just shall live by faith”—was the Scripture that so inflamed the soul of Martin Luther that it became the watchword of the Reformation. It occurs first here in the small prophecy of Habakkuk, but is then quoted three times in the New Testament. The term “just,” of course, means “justified” or “righteous.” God says a person is enabled to live righteously by his faith.