Caritatis §7

⁷ In the matter of directing studies, We have repeatedly given directives with regard to philosophical, theological, and biblical studies. Insist that professors conform to them, but at the same time do not let them neglect any of the other important teachings. Also insist that those who are charged with order and piety (they must be men outstanding for their integrity and prudence) so moderate the discipline of common life and so develop and exercise the spirits of the students that their progress in the appropriate virtues becomes daily more apparent. Under this head also comes the prudence they must learn concerning matters relevant to the civil power. Surely in this manner a new militia will come forth from the schools as if from an athletic arena or a fortress; it will be well-equipped to aid those laboring in the dust and heat and to replace those who are worn out and aged. You can easily see that virtue is exposed to much danger in the performance of the holy ministry and that it is human to grow slack in work and to give up. Therefore offer your priests opportunities to recall and increase their knowledge by study, especially so that, with their spiritual strength renewed, they can more zealously devote their time to their own perfection and bring about the eternal salvation of others. Venerable Brethren, when you have such a clergy, you will realize that your pastoral burden will not only be lightened, but will abound in the desired fruit for the flock. We may hope for an abundance of both from the example and active love of the clergy.