The
keynote of that royal fourth chapter of Paul's letter to the Ephesians is found in the word "unity,"—unity in the thought of God, in the knowledge of His Son, in the faith that relies wholly upon Truth, in the love that blossoms in brotherhood, in the purity that is blameless, in the humility that is childlike, in the manly living that is tender-hearted and compassionate,—such is the compass of a concept whose circle is so complete that though the rest of "the world's best book" were lost, this epitome of right thought and deed would supply the aspiring and obedient with everything essential to their triumph.