The speaking of Christ by the attendants of the meetings is well-speaking. The word "blessing" in Greek simply means "well-speaking." Ephesians 1:3-14 is Paul's blessing to God, and that blessing is nothing other than a well-speaking. When we come together we must speak well about our Triune God, about the Father, about the Son, and about the Spirit. Our well-speaking is our blessing.
To speak blessing is not merely to speak the word "blessing." One hymn begins, "Blessing and honor and glory be Thine" (Hymns, #241). I like this short song, but I doubt that those who sing it know what the blessing is. They may only know how to sing the word "blessing." I hope that some would compose a song of blessing from Ephesians 1:3-14. We need such a portion as these verses to be the real contents of our blessing. The contents of this blessing would be the well-speaking concerning our Triune God and how He has blessed us with the eternal economy of the Father, the Son, and the Holy Spirit—with the Father's selection and predestination, the Son's redemption, and the Spirit's sealing and pledging. The blessing is simply the well-speaking.