Whether it is lawful for religious to teach, preach, and the like?

Objections

Objection 1 : It would seem unlawful for religious to teach, preach, and the like. For it is said (VII, qu. i, can. Hoc nequaquam) in an ordinance of a synod of Constantinople [*Pseudosynod held by Photius in the year 879]: "The monastic life is one of subjection and discipleship, not of teaching, authority, or pastoral care." And Jerome says (ad Ripar. et Desider. [*Contra Vigilant. xvi]): "A monk's duty is not to teach but to lament." Again Pope Leo [*Leo I, Ep. cxx ad Theodoret., 6, cf. XVI, qu. i, can. Adjicimus]: says "Let none dare to preach save the priests of the Lord, be he monk or layman, and no matter what knowledge he may boast of having." Now it is not lawful to exceed the bounds of one's office or transgress the ordinance of the Church. Therefore seemingly it is unlawful for religious to teach, preach, and the like.
Objection 2 : Further, in an ordinance of the Council of Nicea (cf. XVI, qu. i, can. Placuit) it is laid down as follows: "It is our absolute and peremptory command addressed to all that monks shall not hear confessions except of one another, as is right, that they shall not bury the dead except those dwelling with them in the monastery, or if by chance a brother happen to die while on a visit." But just as the above belong to the duty of clerics, so also do preaching and teaching. Therefore since "the business of a monk differs from that of a cleric," as Jerome says (Ep. xiv ad Heliod.), it would seem unlawful for religious to preach, teach, and the like.
Objection 3 : Further, Gregory says (Regist. v, Ep. 1): "No man can fulfil ecclesiastical duties, and keep consistently to the monastic rule": and this is quoted XVI, qu. i, can. Nemo potest. Now monks are bound to keep consistently to the monastic rule. Therefore it would seem that they cannot fulfil ecclesiastical duties, whereof teaching and preaching are a part. Therefore seemingly it is unlawful for them to preach, teach, and do similar things.