On the contrary, It is written (Heb. 5:1): "Every high priest taken from among men, is ordained for men in the things that appertain to God." But angels whether good or bad are not taken from among men. Therefore they are not ordained ministers in the things that appertain to God, i.e. in the sacraments.
I answer that, As stated above (A. 3; Q. 62, A. 5), the whole power of the sacraments flows from Christ's Passion, which belongs to Him as man. And Him in their very nature men, not angels, resemble; indeed, in respect of His Passion, He is described as being "a little lower than the angels" (Heb. 2:9). Consequently, it belongs to men, but not to angels, to dispense the sacraments and to take part in their administration.
But it must be observed that as God did not bind His power to the sacraments, so as to be unable to bestow the sacramental effect without conferring the sacrament; so neither did He bind His power to the ministers of the Church so as to be unable to give angels power to administer the sacraments. And since good angels are messengers of truth; if any sacramental rite were performed by good angels, it should be considered valid, because it ought to be evident that this is being done by the will of God: for instance, certain churches are said to have been consecrated by the ministry of the angels [*See Acta S.S., September 29]. But if demons, who are "lying spirits," were to perform a sacramental rite, it should be pronounced as invalid.
Reply Obj. 1: What men do in a less perfect manner, i.e. by sensible sacraments, which are proportionate to their nature, angels also do, as ministers of a higher degree, in a more perfect manner, i.e. invisibly—by cleansing, enlightening, and perfecting.
Reply Obj. 2: The saints in heaven resemble the angels as to their share of glory, but not as to the conditions of their nature: and consequently not in regard to the sacraments.
Reply Obj. 3: Wicked men do not owe their power of conferring sacraments to their being members of the devil. Consequently, it does not follow that a fortiori the devil, their head, can do so. _______________________
EIGHTH ARTICLE [III, Q. 64, Art. 8]
Whether the Minister's Intention Is Required for the Validity of a
Sacrament?
Objection 1: It seems that the minister's intention is not required for the validity of a sacrament. For the minister of a sacrament works instrumentally. But the perfection of an action does not depend on the intention of the instrument, but on that of the principal agent. Therefore the minister's intention is not necessary for the perfecting of a sacrament.
Obj. 2: Further, one man's intention cannot be known to another. Therefore if the minister's intention were required for the validity of a sacrament, he who approaches a sacrament could not know whether he has received the sacrament. Consequently he could have no certainty in regard to salvation; the more that some sacraments are necessary for salvation, as we shall state further on (Q. 65, A. 4).