20.

As to those miracles, however, which are performed in order to excite the wonder of men, they do greatly err who compare heathen magicians with the holy prophets, who completely eclipse them by the fame of their great miracles. How much more do they err if they compare them with Christ, of whom the prophets, so incomparably superior to magicians of every name, foretold that He would come both in the human nature, which he took in being born of the Virgin, and in the divine nature, in which He is never separated from the Father!

I see that I have written a very long letter, and yet have not said all concerning Christ which might meet the case either of those who from sluggishness of intellect are unable to comprehend divine things, or of those who, though endowed with acuteness, are kept back from discerning truth through their love of contradiction and the prepossession of their minds in favour of long-cherished error. Howbeit, take note of anything which influences them against our doctrine, and write to me again, so that, if the Lord help us, we may, by letters or by treatises, furnish an answer to all their objections. May you, by the grace and mercy of the Lord, be happy in Him, my noble and justly distinguished lord, my son dearly beloved and longed for!