11 God ordained that his ministry would be the effective and special means of checking the rebels' boldness and teaching and inspiring the Church's children. He restrained the former's mad extravagances by the example of his life and labor, and met their empty charges with the most powerful eloquence. He fanned the latter's hopes and kindled their zeal. Even from his youth he cultivated in a remarkable manner all the virtues of the true reformer which others possessed only in varying degrees. These virtues are fortitude, counsel, doctrine, authority, ability, and alacrity. He put them all in the service of Catholic truth against the attacks of error (which is precisely the mission of the Church). He revived the faith that had either become dormant or almost extinct in many by strengthening it with many wise laws and practices. He restored that discipline which had been overthrown by bringing the morals of clergy and people alike back to the ideals of Christian living. In executing all the duties of a reformer he also fulfilled the functions of the "good and faithful servant." Later he performed the works of the high priest who "pleased God in his days and was found just." He is, therefore, a worthy example for both clergy and laity, rich and poor. He can be numbered among those whose excellence as a bishop and prelate is eulogized by the Apostle Peter when he says that he became "from the heart a pattern to the flock." Even before the age of twenty- three and although elevated to the highest honors and entrusted with very important and difficult ecclesiastical matters, Charles made truly wonderful daily progress in the practice of virtue through the contemplation of divine things. This sacred retirement perfected him, prepared him for later days, and caused him to shine forth as "a spectacle to the world, and angels, and men."
Source: Editae Saepe (Vatican.va)