21 This wonderful example of chastity seems to have special application to the priests of our time who—as is unfortunately the case in many regions—are often forced by the office they have assumed to live in the midst of a human society that is infected by a general looseness in morals and a spirit of unbridled lust. How often this phrase of St. Thomas Aquinas is proved true: "It is harder to lead a good life in the work of caring for souls, because of the external dangers involved" (32) To this We might add the fact that they often feel themselves cut off from the society of others and that even the faithful to whose salvation they are dedicated do not understand them and offer them little help or support in their undertakings.
Source: Sacerdotii Nostri Primordia (Vatican.va)