Depuis le Jour §13

¹³ Once in possession of the Latin tongue-the key, so to say, of sacred science - and their mental faculties sufficiently developed by the study of the belles lettres , young men destined for the priesthood pass from the junior to the senior seminary. There they will prepare themselves by piety and the exercise of the priestly virtues for the reception of Holy Orders, while devoting themselves to the study of philosophy and theology.