5 In order that young men who display qualities suitable for the sacred ministry may not be lacking, Venerable Brethren, We wish to insist most earnestly on what We have already frequently pointed out. That is to say, you have a very serious obligation before God of guarding and fostering most solicitously the proper conduct of the seminaries. Your priests will be as you have trained them. The letter of December 8, 1902, which Our most prudent Predecessor addressed to you as a testament from his long Pontificate is very important. We desire to add nothing new to it; We shall merely remind you of the rules it lays down. We especially recommend the immediate execution of Our orders, published through the Sacred Congregation of Bishops and Regulars, on the concentration of the seminaries especially for the study of philosophy and theology. In this way the great advantage resulting from the separation of the major and minor seminaries and the no less great advantage of the necessary instruction of the clergy will be secured.
Source: Pieni L'Animo (Vatican.va)