Whether it belongs to a priest to catechize and exorcize the person to be baptized?

Objections

Objection 1 : It seems that it does not belong to a priest to catechize and exorcize the person to be baptized. For it belongs to the office of ministers to operate on the unclean, as Dionysius says (Eccl. Hier. v). But catechumens who are instructed by catechism, and "energumens" who are cleansed by exorcism, are counted among the unclean, as Dionysius says in the same place. Therefore to catechize and to exorcize do not belong to the office of the priests, but rather to that of the ministers.
Objection 2 : Further, catechumens are instructed in the Faith by the Holy Scripture which is read in the church by ministers: for just as the Old Testament is recited by the Readers, so the New Testament is read by the Deacons and Subdeacons. And thus it belongs to the ministers to catechize. In like manner it belongs, seemingly, to the ministers to exorcize. For Isidore says (Epist. ad Ludifred.): "The exorcist should know the exorcisms by heart, and impose his hands on the energumens and catechumens during the exorcism." Therefore it belongs not to the priestly office to catechize and exorcize.
Objection 3 : Further, "to catechize" is the same as "to teach," and this is the same as "to perfect." Now this belongs to the office of a bishop, as Dionysius says (Eccl. Hier. v). Therefore it does not belong to the priestly office.