5 Since the training of students depends both on wise laws and, most of all, on qualified educators, the administrators and teachers of seminaries are to be selected from the best men, and are to be carefully prepared in sound doctrine, suitable pastoral experience and special spiritual and pedagogical training. Institutes, therefore, should be set up to attain this end. Or at least courses are to be arranged with a proper program, and the meetings of seminary directors are to take place at specified times. Administrators, however, and teachers must be keenly aware of how much the success of the students' formation depends on their manner of thinking and acting. Under the rector's leadership they are to form a very closely knit community both in spirit and in activity and they are to constitute among themselves and with the students that kind of family that will answer to the Lord's prayer "That they be one" (cf. John 17:11) and that will develop in the students a deep joy in their own vocation. The bishop, on the other hand, should, with a constant and loving solicitude, encourage those who labor in the seminary and prove himself a true father in Christ to the students themselves. Finally, all priests are to look on the seminary as the heart of the diocese and are to offer willingly their own helpful service.
Source: Optatam Totius (Vatican.va)