Doctrine occupies the greatest portion of the Book of Ephesians. Half of the teaching in this epistle relates to our standing in Christ, and the remainder of it affects our condition. All too often those who teach from this book bypass all the foundational instruction and go directly to the closing chapter. It is this chapter that emphasizes the warfare or the struggle of the saints. However, to benefit fully from the contents of this epistle, one must begin at the beginning of Paul's instruction in this letter.
Paul's writing breaks down into three main segments: (1) principles with respect to God's accomplishment, (2) principles regarding our present existence, and (3) principles concerning our daily struggle.