Santo Agostinho
Santo Agostinho · Augustinus in Ioannem · séc. V
Agostinho, no *In Ioannem*, distingue os três enunciados de Jo 1,1 com precisão filosófica: o primeiro afirma eternidade, o segundo distinção pessoal, o terceiro identidade de natureza. "Era Deus" não é o mesmo que "era o Deus" (com artigo): João evita tanto o modalismo (confundir as pessoas) quanto o subordinacionismo (reduzir o Filho a uma divindade inferior).
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Words by their daily use, sound, and passage out of us, have become common things. But there is a word which remains inward, in the very man himself; distinct from the sound which proceeds out of the mouth. There is a word, which is truly and spiritually that, which you understand by the sound, not being the actual sound. Now whoever can conceive the notion of word, as existing not only before its sound, but even before the idea of its sound is formed, may see enigmatically, and as it were in a glass, some similitude of that Word of Which it is said, In the beginning was the Word. For when we give expression to something which we know, the word used is necessarily derived from the knowledge thus retained in the memory, and must be of the same quality with that knowledge. For a word is a thought formed from a thing which we know; which word is spoken in the heart, being neither Greek nor Latin, nor of any language, though, when we want to communicate it to others, some sign is assumed by which to express it.. Wherefore the word which sounds externally, is a sign of the word which lies hid within, to which the name of word more truly appertains. For that which is uttered by the mouth of our flesh, is the voice of the word; and is in fact called word, with reference to that from which it is taken, when it is developed externally.