13 In this manner, aided by loving care and fitting culture of soul and mind, step by step the young Levite will be brought up to recognize both the sanctity of his vocation and the needs of the Christian people. The training, 'tis true, is not short; and yet it is to be wished that the time in the seminary could be prolonged. It is necessary, indeed, that the young priests are not left without guidance in their first labors, but should be strengthened by the experience of their seniors, who will ripen their zeal, their prudence and their piety; and it is expedient also that either with academic exercises or with periodical conferences they should be encouraged to continue with their sacred studies.
Source: Fin dal Principio (Vatican.va)