Many of Paul's letters begin with doctrinal truths, instructing readers in basic Christian beliefs. Then, after the reader has a clearer understanding of faith in Christ, the second half of the letter deals explicitly with how to live out the Christian faith in the world. The two sections are often joined by a single verse. These “hinge” verses can be clearly seen in Romans (12:1), Galatians (5:1), and Colossians (3:1). The same is true for Ephesians, where in 4:1 we see the beginning of a highly practical section, one that teaches believers how to apply the great truths of God's sovereignty and salvation in day-to-day life.