By the grace of the Most Holy Spirit, we have been vouchsafed to celebrate Holy Pentecost—the descent of the Holy Spirit. Jesus Christ said of this descent: Nevertheless I tell you the truth; It is expedient for you that I go away: for if I go not away, the Comforter (that is, the Holy Spirit), will not come unto you; but if I depart, I will send him unto you. Howbeit when he, the Spirit of truth, is come, he will guide you into all truth. (Jn. 16:7, 13). This, His promise and benefit, is so great that we cannot even comprehend it: for the Lord promised to send not an Angel, not a man, but the Holy Spirit Himself.