69 The complete education of the candidate for the priesthood should be directed to help him acquire a tranquil, convinced and free choice of the grave responsibilities which he must assume in conscience before God and the Church. Ardor and generosity are marvelous qualities of youth; illuminated and supported, they merit, along with the blessing of the Lord, the admiration and confidence of the whole Church as well as of all men. None of the real personal and social difficulties which their choice will bring in its train should remain hidden to the young men, so that their enthusiasm will not be superficial and illusory. At the same time it will be right to highlight with at least equal truth and clarity the sublimity of their choice, which, though it may lead on the one hand to a certain physical and psychic void, nevertheless on the other brings with it an interior richness capable of elevating the person most profoundly.
Source: Sacerdotalis Caelibatus (Vatican.va)