"do not say that 'mere faith in our Lord Jesus Christ can save me.' For this is impossible unless you acquire love for him through works. For in what concerns mere believing, 'even the devils believe and tremble.'"

σὺ μὴ εἴπῃς, ὅτι ἡ ψιλὴ πίστις εἰς τὸν Κύριον ὑμῶν Ἰησοῦν Χριστὸν δύναταί με σῶσαι.  Ἀμήχανον γὰρ τοῦτο, ἐὰν μὴ καὶ τήν ἀγάπην τὴν εἰς αὐτὸν διὰ τῶν ἔργων κτήσῃ.  Τὸ γάρ ψιλῶς πιστεύειν, καὶ τὰ δαιμόνια πιστεύουσι καὶ φρίσσουσι.

     Maximus the Confessor, Four hundred chapters on love 1.39, trans. George C. Berthold, in Maximus Confessor:  selected writings,Classics of Western spirituality (New York:  Paulist Press, 1985), 39.  Capitoli sulla carità, ed. Aldo Ceresa-Gastaldo, Verba seniorum n.s. 3 (Roma : Editrice Studium, 1963), 62; PG 90, col. .