89 Inspiring this discipline, which is at once severe and merciful, are justice and truth, prudence and reserve. It is without doubt a discipline which will confirm good priests in their determination to live lives of purity and holiness. At the same time it will be a warning to those aspiring to the priesthood. Guided by the wisdom of those who educate them, they will approach their priesthood fully aware of its obligations and entirely forgetfully of self, responding generously to divine grace and the will of Christ and His Church.
Source: Sacerdotalis Caelibatus (Vatican.va)