22 But this is not enough. Gregory rebukes the bishop who, through love of spiritual solitude and prayer, fails to go out into the battlefield to combat strenuously for the cause of the Lord: "The name of bishop, which he bears, is an empty one." And rightly so, for men's intellects are to be enlightened by continual preaching of the truth, and errors are to be efficaciously refuted by the principles of true and solid philosophy and theology, and by all the means provided by the genuine progress of historical investigation. It is still more necessary to inculcate properly on the minds of all the moral maxims taught by Jesus Christ, so that everybody may learn to conquer himself, to curb the passions of the mind, to stifle pride, to live in obedience to authority, to love justice, to show charity towards all, to temper with Christian love the bitterness of social inequalities, to detach the heart from the goods of the world, to live contented with the state in which Providence has placed us, while striving to better it by the fulfillment of our duties, to thirst after the future life in the hope of eternal reward. But, above all, is it necessary that these principles be instilled and made to penetrate into the heart, so that true and solid piety may strike root there, and all, both as men and as Christians, may recognize by their acts, as well as by their words, the duties of their state and have recourse with filial confidence to the Church and her ministers to obtain from them pardon for their sins, to receive the strengthening grace of the Sacraments, and to regulate their lives according to the laws of Christianity.
Source: Iucunda Sane (Vatican.va)