13 Thus also the Apostle Paul, when he was urging the merits of peace and charity, and when he was strongly asserting and teaching that neither faith nor alms, nor even the passion itself of the confessor and the martyr, would avail him, unless he kept the requirements of charity entire and inviolate, added, and said: “Charity, is magnanimous, charity is kind, charity envies not;” teaching, doubtless, and showing that whoever is magnanimous, and kind, and averse from jealousy and rancour, such a one can maintain charity. Moreover, in another place, when he was advising that the man who has already become filled with the Holy Spirit, and a son of God by heavenly birth, should observe nothing but spiritual and divine things, he lays it down, and says: “And I indeed, brethren, could not speak unto you as unto spiritual, but as unto carnal, even as unto babes in Christ. I have fed you with milk, not with meat: for you were not able hitherto; moreover, neither now are you able. For you are yet carnal: for whereas there are still among you jealousy, and contention, and strifes, are you not carnal, and walk as men?”
Source: The Treatises of Cyprian (New Advent)