Gratia non tollit naturam, sed perficit

"Love alone, properly speaking, proves that the human person is in the image of the Creator, by making his self-determination submit to reason, not bending reason under it, and [by] persuading the inclination to follow nature and not in any way to be at variance with the logos of nature.  In this way we are all, as it were, one nature, so that we are able to have one inclination and one will with God and with one another, not having any discord with God or one another, whenever by the law of grace, through which by our inclination the law of nature is renewed [(whenever by the law of grace, through which we deliberately renew the law of nature)], we choose what is ultimate."

Αὔτη μόνη, κυρίως εἰπεῖν, κατ' εἰκόνα τοῦ Κτίσαντος τὸν ἄνθρωπον ὄντα παρίστησι, τῷ μὲν λόγῳ σοφῶς τὸ ἐφ' ἡμῖν ὑποτάσσουσα· τούτῳ δὲ τὸν λόγον οὐχ ὑποκλίνουσα· καὶ πείθουσα τὴν γνώμην κατὰ τὴν φύσιν πορεύεσθαι, μηδαμῶς πρὸς τὸν λόγον τῆς φύσεως στασιάζουσαν· καθ' ὃν ἄπαντες ὥσπερ μίαν φύσιν, οὕτω δὲ καὶ μίαν γνώμην καὶ θέλημα ἓν, θεῷ καὶ ἀλλήλοις ἔχειν δυνάμεθα, οὐδεμίαν πρὸς θεὸν καὶ ἀλλήλους διάστασιν ἔχοντες, ὅτ' ἂν τῷ νόμῳ τῆς χάριτος, δι' οὗ τὸν νόμον τῆς φύσεως γνωμικῶς ἀνακαινίζομεν, στοικεῖον προαιρούμεθα.

     Maximus the Confessor, Letter to John the Cubicularius On charity dated c. 626, trans. Louth and quoted in the Introduction to On the cosmic mystery of Jesus Christ:  selected writings on St. Maximus the Confessor, trans. Paul M. Blowers and Robert Louis Wilken, Popular patristics series 25 (Crestwood, NY:  St. Vladimir’s Seminary Press, 2003), 43, underscoring mine.  The Greek should be checked for errors-in-transcription against a more crisply printed copy of PG 91, col. 396C-D.  On ἀνακαινίζω see Heb 6:4 on renewal again to repentance, but also ἀνακαινόω at 2 Cor 4:16 and Col 3:10 (there are a few occurrences in the Septuagint as well (e.g. Ps 102 (103):5 and 103 (104):30)).