1 The "Doctor Mellifluus," "the last of the Fathers, but certainly not inferior to the earlier ones," was remarkable for such qualities of nature and of mind, and so enriched by God with heavenly gifts, that in the changing and often stormy times in which he lived, he seemed to dominate by his holiness, wisdom, and most prudent counsel. Wherefore, he has been highly praised, not only by the sovereign Pontiffs and writers of the Catholic Church, but also, and not infrequently, by heretics. Thus, when in the midst of universal jubilation, Our predecessor, Alexander III, of happy memory, inscribed him among the canonized saints, he paid reverent tribute when he wrote: "We have passed in review the holy and venerable life of this same blessed man, not only in himself a shining example of holiness and religion, but also shone forth in the whole Church of God because of his faith and of his fruitful influence in the house of God by word and example; since he taught the precepts of our holy religion even to foreign and barbarian nations, and so recalled a countless multitude of sinners . . . to the right path of the spiritual life." "He was," as Cardinal Baronius writes, "a truly apostolic man, nay, a genuine apostle sent by God, mighty in work and word, everywhere and in all things adding luster to his apostolate through the signs that followed, so that he was in nothing inferior to the great apostles, . . . and should be called . . . at one and the same time an adornment and a mainstay of the Catholic Church."
Source: Doctor Mellifluus (Vatican.va)