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 would seem that a man ought not to be debarred from receiving Orders on account of a lack of members. For one who is afflicted should not receive additional affliction. Therefore a man ought not to be deprived of the degree of Orders on account of his suffering a bodily defect.
Obj. 2: Further, Integrity of discretion is more necessary for the act of Orders than integrity of body. But some can be ordained before the years of discretion. Therefore they can also be ordained though deficient in body.
On the contrary, The like were debarred from the ministry of the Old Law (Levit. xxi. 18 seqq.). Much more therefore should they be debarred in the New Law.
We shall speak of bigamy in the treatise on Matrimony (Q. LXVL).
I answer that, As appears from what we have said above (AA. 3, 4, 5), a man is disqualified from receiving Orders, either on account of an impediment to the act, or on account of an impediment affecting his personal comeliness. Hence he who suffers from a lack of members is debarred from receiving Orders, if the defect be such as to cause a notable blemish, whereby a man's comeliness is bedimmed (for instance if his nose be cut off) or the exercise of his Order imperilled; otherwise he is not debarred. This integrity, however, is necessary for the lawfulness and not for the validity of the sacrament.
This suffices for the Replies to the Objections,
Also online, linked only: the same translation at New Advent and the Latin text at Corpus Thomisticum. Neither is copied here.