Peace be to the brethren. There is a double invocation of blessing—to the brethren, and to all that love the Lord. "The brethren" must mean the members of the Church addressed, with special reference to the amalgamation in one body of Jews and Gentiles, or to the one family (Ephesians 3:15) in which they were brethren, Peace is the echo of Ephesians 1:2, and denotes the apostle's desire for the continuance among them of the peace with God to which they had been admitted, as well as the prevalence of peace in every sense of the word.
And love with faith. "Love" in the widest sense (Ephesians 3:17, Ephesians 3:19)—the love of Christ to them, their love to Christ, and their love to one another; and love is coupled with faith, because faith is the companion of love, they are in the closest relation to each other.
Faith in Christ receives him as he is offered, in all his love and goodness; it sees his loving face, and is changed into the same image. From God the Father and the Lord Jesus Christ (comp. Ephesians 1:2).