11 The norms of Christian education are to be religiously observed and properly complemented by the newer findings of sound psychology and pedagogy. Therefore, by a wisely planned training there is also to be developed in the students a due human maturity. This will be made especially evident in stability of mind, in an ability to make weighty decisions, and in a sound evaluation of men and events. The students should be accustomed to work properly at their own development. They are to be formed in strength of character, and, in general, they are to learn to esteem those virtues which are held in high regard by men and which recommend a minister of Christ. Such virtues are sincerity of mind, a constant concern for justice, fidelity to one's promises, refinement in manners, modesty in speech coupled with charity. The discipline of seminary life is to be reckoned not only as a strong safeguard of community life and of charity but also as a necessary part of the total whole training formation. For thereby self- mastery is acquired, solid personal maturity is promoted, and the other dispositions of mind are developed which very greatly aid the ordered and fruitful activity of the Church. Seminary discipline should be so maintained, however, that the students acquire an internal attitude whereby they accept the authority of superiors from personal conviction, that is to say, from a motive of conscience (cf. Rom. 13:5), and for supernatural reasons. The norms of discipline are to be applied according to the age of the students so that they themselves, as they gradually learn self-mastery, may become accustomed to use freedom wisely, to act spontaneously and energetically, and to work together harmoniously with their fellows and with the laity. The whole pattern of seminary life, permeated with a desire for piety and silence and a careful concern for mutual help, must be so arranged that it provides, in a certain sense, an initiation into the future life which the priest shall lead.
Source: Optatam Totius (Vatican.va)