Obj. 3: Further, Dionysius says (Eccl. Hier. iii, iv) that this sacrament, like chrism, has the power of perfecting. But it belongs, not to priests, but to bishops, to sign with the chrism. Therefore likewise, to dispense this sacrament belongs to the bishop and not to the priest.
On the contrary, It is written (De Consecr., dist. 12): "It has come to our knowledge that some priests deliver the Lord's body to a layman or to a woman to carry it to the sick: The synod therefore forbids such presumption to continue; and let the priest himself communicate the sick."
I answer that, The dispensing of Christ's body belongs to the priest for three reasons. First, because, as was said above (A. 1), he consecrates as in the person of Christ. But as Christ consecrated His body at the supper, so also He gave it to others to be partaken of by them. Accordingly, as the consecration of Christ's body belongs to the priest, so likewise does the dispensing belong to him. Secondly, because the priest is the appointed intermediary between God and the people; hence as it belongs to him to offer the people's gifts to God, so it belongs to him to deliver consecrated gifts to the people. Thirdly, because out of reverence towards this sacrament, nothing touches it, but what is consecrated; hence the corporal and the chalice are consecrated, and likewise the priest's hands, for touching this sacrament. Hence it is not lawful for anyone else to touch it except from necessity, for instance, if it were to fall upon the ground, or else in some other case of urgency.
Reply Obj. 1: The deacon, as being nigh to the priestly order, has a certain share in the latter's duties, so that he may dispense the blood; but not the body, except in case of necessity, at the bidding of a bishop or of a priest. First of all, because Christ's blood is contained in a vessel, hence there is no need for it to be touched by the dispenser, as Christ's body is touched. Secondly, because the blood denotes the redemption derived by the people from Christ; hence it is that water is mixed with the blood, which water denotes the people. And because deacons are between priest and people, the dispensing of the blood is in the competency of deacons, rather than the dispensing of the body.
Reply Obj. 2: For the reason given above, it belongs to the same person to dispense and to consecrate this sacrament.
Reply Obj. 3: As the deacon, in a measure, shares in the priest's "power of enlightening" (Eccl. Hier. v), inasmuch as he dispenses the blood, so the priest shares in the "perfective dispensing" (Eccl. Hier. v) of the bishop, inasmuch as he dispenses this sacrament whereby man is perfected in himself by union with Christ. But other perfections whereby a man is perfected in relation to others, are reserved to the bishop. _______________________
FOURTH ARTICLE [III, Q. 82, Art. 4]
Whether the Priest Who Consecrates Is Bound to Receive This Sacrament?
Objection 1: It seems that the priest who consecrates is not bound to receive this sacrament. Because, in the other consecrations, he who consecrates the matter does not use it, just as the bishop consecrating the chrism is not anointed therewith. But this sacrament consists in the consecration of the matter. Therefore, the priest performing this sacrament need not use the same, but may lawfully refrain from receiving it.
Obj. 2: Further, in the other sacraments the minister does not give the sacrament to himself: for no one can baptize himself, as stated above (Q. 66, A. 5, ad 4). But as Baptism is dispensed in due order, so also is this sacrament. Therefore the priest who consecrates this sacrament ought not to receive it at his own hands.