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 one who is excommunicated or suspended can excommunicate another. For such a one has lost neither Orders nor jurisdiction, since neither is he ordained anew when he is absolved, nor is his jurisdiction renewed. But excommunication requires nothing more than Orders or jurisdiction. Therefore even one who is excommunicated or suspended can excommunicate.
Obj. 2: Further, it is a greater thing to consecrate the body of Christ than to excommunicate. But such persons can consecrate. Therefore they can excommunicate.
On the contrary, One whose body is bound cannot bind another. But spiritual gyves are stronger than bodily fetters. Therefore one who is excommunicated cannot excommunicate another, since excommunication is a spiritual chain.
I answer that, Jurisdiction can only be used in relation to another man. Consequently, since every excommunicated person is severed from the communion of the faithful, he is deprived of the use of jurisdiction. And as excommunication requires jurisdiction, an excommunicated person cannot excommunicate, and the same reason applies to one who is suspended from jurisdiction. For if he be suspended from Orders only, then he cannot exercise his Order, but he can use his jurisdiction, while, on the other hand, if he be suspended from jurisdiction and not from Orders, he cannot use his jurisdiction, though he can exercise his Order: and if he be suspended from both, he can exercise neither.
Reply Obj. 1: Although an excommunicated or suspended person does not lose his jurisdiction, yet he does lose its use.
Reply Obj. 2: The power of consecration results from the power of the character which is indelible, wherefore, from the very fact that a man has the character of Order, he can always consecrate, though not always lawfully. It is different with the power of excommunication which results from jurisdiction, for this can be taken away and bound.
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Also online, linked only: the same translation at New Advent and the Latin text at Corpus Thomisticum. Neither is copied here.