29 The picture of the true priest, as Gregory understands and describes him, is the man "who, dying to all passions of the flesh, already lives spiritually; who has no thought for the prosperity of the world; who has no fear of adversity; who desires only internal things; who does not permit himself to desire what belongs to others but is liberal of his own; who is all bowels of compassion and inclines to forgiveness, but in forgiveness never swerves unduly from the perfection of righteousness; who never commits unlawful actions, but deplores as though they were his own the unlawful actions of others; who with all affection of the heart compassionates the weakness of others, and rejoices in the prosperity of his neighbor as in his own profit; who in all his doings so renders himself a model for others as to have nothing whereof to be ashamed, at least, as regards his external actions; who studies so to live that he may be able to water the parched hearts of his neighbors with the waters of doctrine; who knows through the use of prayer and through his own experience that he can obtain from the Lord what he asks" ( Reg. Past . i. 10).
Source: Iucunda Sane (Vatican.va)