5 In what concerns yourselves, Dear Son and Venerable Brethren, use all your vigilance so that all men of science, and those, most especially, to whom you have confided the charge of teaching youth, be of one accord, and unanimous in all those questions upon which the teaching of the Holy See allows no freedom of opinion. And as to points left to the discussion of the learned, may their intellects, owing to your inspiration and your advice, be so exercised upon them that the divergences of opinion destroy not union of heart and concord of will. On this subject the Sovereign Pontiff, Benedict XIV., our immortal predecessor, has left in his Constitution Sollicita ac provides , certain rules for men of study, full of wisdom and authority. He has even proposed to them, as a model to imitate in this matter, St. Thomas Aquinas, whose moderation of language and maturity of style are maintained as well in the combat against adversaries, as in the exposition of doctrine and the proofs destined for its defence. We wish to renew to learned men the recommendations of our predecessor, and to point out to them this noble model, who will teach them not only the manner of carrying on controversy with opponents, but also the character of the doctrine to be held and developed in the cultivation of philosophy and theology. On many occasions, Dear Son and Venerable Brethren, we have expressed to you our earnest desire of seeing the wisdom of St. Thomas reinstated in Catholic schools, and everywhere treated with the highest consideration. We have likewise exhorted you to establish in the University of Louvain the teaching of higher philosophy in the spirit of St. Thomas. In this matter, as in all others, we have found you entirely ready to condescend to our wishes and to fulfill our will. Pursue then, with zeal, the task which has been begun, and watch with care that in this same University the fruitful sources of Christian philosophy, which spring from the works of St. Thomas, be open to students in a rich abundance, and applied to the profit of all other branches of instruction. In the execution of this design, if you have need of our aid or our counsels, they shall never be wanting to you.
Source: Licet Multa (Vatican.va)