As grain once scattered on the hillsides
Was in this broken bread made one
So from all lands your church be gathered
Into your kingdom by your Son.

Didache

“This is the Lamb of God, who takes away the sins of the world. Happy are those who are called to his supper.”
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“Lord, I am not worthy to receive you, but only say the word and I shall be healed.”

Excerpts # 26-28, PART II Norms for the Distribution of Holy Communion Under Both Kinds

The Minister of Holy Communion

26. By virtue of his sacred ordination, the bishop or priest offers the sacrifice in the person of Christ, the Head of the Church. He receives gifts of bread and wine from the faithful, offers the sacrifice to God, and returns to them the very Body and Blood of Christ, as from the hands of Christ himself.³⁹ Thus bishops and priests are considered the ordinary ministers of Holy Communion. In addition the deacon who assists the bishop or priest in distributing Communion is an ordinary minister of Holy Communion. When the Eucharist is distributed under both forms, "the deacon ministers the chalice."⁴⁰

27. In every celebration of the Eucharist there should be a sufficient number of ministers for Holy Communion so that it can be distributed in an orderly and reverent manner. Bishops, priests, and deacons distribute Holy Communion by virtue of their office as ordinary ministers of the Body and Blood of the Lord.⁴¹

Extraordinary Ministers of Holy Communion

28. When the size of the congregation or the incapacity of the bishop, priest, or deacon requires it, the celebrant may be assisted by other bishops, priests, or deacons.⁴² If such ordinary ministers of Holy Communion are not present, "the priest may call upon extraordinary ministers to assist him, i.e., formally instituted acolytes or even some of the faithful who have been commissioned according to the prescribed rite. In case of necessity, the priest may also commission suitable members of the faithful for the occasion."⁴³ Extraordinary ministers of Holy Communion should receive sufficient spiritual, theological, and practical preparation to fulfill their role with knowledge and reverence. When recourse is had to Extraordinary Minister of Holy Communion, especially in the distribution of Holy Communion under both kinds, their number should not be increased beyond what is required for the orderly and reverent distribution of the Body and Blood of the Lord. In all matters such Extraordinary Ministers of Holy Communion should follow the guidance of the diocesan bishop.
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³⁹Cf. Congregation of Rites, Eucharisticum Mysterium: On Worship of the Eucharist [EM] (May 25, 1967), part I, "General Principles to Be Given Prominence in Catechizing the People on the Eucharistic Mystery" (DOL 179, nos. 1234-1244).
⁴⁰Cf. GIRM, no. 93.
⁴¹GIRM, no. 162.
⁴²Cf. GIRM, no. 108.
⁴³43. Cf. GIRM, no. 162.