18 It will be the bishops' concern that young men suited by temperament, virtue, and ability be sent to special institutes faculties, or universities so that priests may be trained at a higher scientific level in the sacred sciences and in other fields which may be judged opportune. Thus they will be able to meet the various needs of the apostolate. The spiritual and pastoral training of these men, however, especially if they are not yet ordained as priests, is in no way to be neglected.
Source: Optatam Totius (Vatican.va)