From the Supplement, compiled after Aquinas’s death from his Commentary on the Sentences and transcribed here from the 1917 to 1922 printings. About the Supplement.
Text: Summa Theologiae, Supplement to the Third Part (Supplementum Tertiae Partis), transcribed from Internet Archive scans, translated by the Fathers of the English Dominican Province. The Supplement, compiled after Aquinas’s death from his earlier Commentary on the Sentences, in the same English Dominican translation as the Gutenberg Parts. Transcribed by Bibliotheca Catholica from the OCR of four Internet Archive scans of the pre-1931 printings (Questions 1 to 33 from the 1917 Washbourne and Benziger volume, 34 to 68 from the 1922 volume, 69 to 86 from the 1921 volume, and 87 to 99 from the 1922 Benziger volume), with OCR errors corrected and doubtful passages marked, not rewritten. 99 questions and 446 articles. The two appendices printed after Question 99 are not included. Sources, SHA-256 of each OCR file, and the method are in the source record. Rights: Public domain (US)
The Supplement is not a Project Gutenberg text. It is Bibliotheca Catholica’s transcription of public-domain scans at the Internet Archive; obvious OCR errors were corrected, and passages marked “OCR uncertain” could not be confidently corrected, so check them against the linked scan page.
Objection 1: It seems that none but a bishop can confer this sacrament. For this sacrament consists in an anointing, just as Confirmation does. Now none but a bishop can confirm. Therefore only a bishop can confer this sacrament.
Obj. 2: Further, He who cannot do what is less cannot do what is greater. Now the use of consecrated matter surpasses the act of consecrating the matter, since the former is the end of the latter. Therefore since a priest cannot consecrate the matter, neither can he use the matter after it has been consecrated.
On the contrary, The minister of this sacrament has to be brought in to the recipient, as is clear from James v. 14. Now a bishop cannot go to all the sick people of his diocese. Therefore the bishop is not the only one who can confer this sacrament.
I answer that, According to Dionysius (Eccl. Hier. v.), the office of perfecting belongs to a bishop, just as it belongs to a priest to enlighten. Wherefore those sacraments are reserved to a bishop's dispensation, which place the recipient in a state of perfection above others. But this is not the case with this sacrament, for it is given to all. Consequently it can be given by ordinary priests.
Reply Obj. 1: Confirmation imprints a character, whereby man is placed in a state of perfection, as stated above (P. IIl., O. LXIIL, AA. I, 2, 6). But this does not take place in this sacrament; hence there is no comparison.
Reply Obj. 2: Although the use of consecrated matter is of more importance than the consecration of the matter.
from the point of view of the final cause; nevertheless, from the point of view of efficient cause, the consecration of the matter is the more important, since the use of the matter is dependent thereon, as on its active cause: hence the consecration of the matter demands a higher power than the use of the matter does.
Also online, linked only: the same translation at New Advent and the Latin text at Corpus Thomisticum. Neither is copied here.