Pope Paul VI
Sacerdotalis Caelibatus §94
Sacerdotalis Caelibatus: On the Celibacy of the Priest
94 Venerable brothers, all of you are certainly convinced that to restore to the soul of a priest joy in and enthusiasm for his vocation, interior peace and salvation, is an urgent and glorious ministry which has an incalculable influence on a multitude of souls. There will be times when you must exercise your authority by showing a just severity toward those few who, after having resisted your kindness, by their conduct cause scandal to the People of God; but you will take the necessary precautions to ensure their seeing the error of their ways. Following the example of our Lord Jesus, "the Shepherd and Guardian of your souls," (142) do not crush the "bruised reed" nor quench the "smoldering wick"; (l43) like Jesus, heal their wounds, (144) save what was lost; (145) with eagerness and love go in search of the lost sheep and bring him back to the warmth of the sheepfold (146) and like Him, try until the end (147) to call back the unfaithful friend.
Source: Sacerdotalis Caelibatus (Vatican.va)