In the Liturgy of the Word during the Mass, we have **two witnesses ** the first witness **announces the coming of the Lord Jesus from a reading from the Old Testament Pentateuch (law) or Prophets, The next witness is an eyewitness **(Apostle) account of Jesus from an Epistle from the New Testament, both “Proclamations” are generally proclaimed by a Lay person of the “Confirmed” Apostolic faith, which is followed by the “Alleluiah” Proclaimed by song from the mystical body of Jesus Christ, which includes the Church Triumphant from heaven with the heavenly Angels in participation with the Church Militant on earth which pronounces the coming of the Word of God himself from the Gospels, **which can only be proclaimed by “one who is sent” from God who possesses the consecrated life **(of Holy Orders) unto the Lord from the Apostolic ministries which include the biblical “Overseer”(Bishops) “Presbyters” (Priest) and or “Deacons”, who are sent to proclaim the Gospel of Jesus Christ, and feed (teach) the Church Jesus built upon Peter in the Catholic Church today.
The Rule has existed since Jesus Christ instituted the Eucharist at the Last supper when Jesus commanded his Apostles to “do this in rememberance of me”.
The Gospel is proclaimed from those who are living the Gospel consecrated life, and then the True Presence of the Word made flesh in the mysteries of the “parousia” Eucharist confected by a Priest or Bishop in persona Christi, "
John 17:6
"I revealed your name 5 to those whom you gave me out of the world. They belonged to you, and you gave them to me, and they have kept your word.
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Now they know that everything you gave me is from you,
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**because the words you gave to me I have given to them, and they accepted them and truly understood that I came from you, and they have believed that you sent me. **9
I pray for them. I do not pray for the world but for the ones you have given me, because they are yours,
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and everything of mine is yours and everything of yours is mine, and I have been glorified in them.
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**And now I will no longer be in the world, but they are in the world, while I am coming to you. Holy Father, keep them in your name that you have given me, so that they may be one just as we are. **
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When I was with them I protected them in your name that you gave me, and I guarded them, and none of them was lost except the son of destruction, in order that the scripture might be fulfilled.
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But now I am coming to you. I speak this in the world so that they may share my joy completely.
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**I gave them your word, and the world hated them, because they do not belong to the world any more than I belong to the world.
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6 I do not ask that you take them out of the world but that you keep them from the evil one.
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They do not belong to the world any more than I belong to the world.
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Consecrate them in the truth. Your word is truth. **
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**As you sent me into the world, so I sent them into the world. **
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And I consecrate myself for them, so that they also may be consecrated in truth.
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**“I pray not only for them, but also for those who will believe in me through their word, **
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**so that they may all be one, as you, Father, are in me and I in you, that they also may be in us, that the world may believe that you sent me. **
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And I have given them the glory you gave me, so that they may be one, as we are one,
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**I in them and you in me, that they may be brought to perfection as one, that the world may know that you sent me, and that you loved them even as you loved me. **
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**Father, they are your gift to me. I wish that where I am 7 they also may be with me, that they may see my glory that you gave me, because you loved me before the foundation of the world. **
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Righteous Father, the world also does not know you, but I know you, and they know that you sent me.
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**I made known to them your name and I will make it known, 8 that the love with which you loved me may be in them and I in them.” **