Books And Fruit

Εἴ σέ τι ὤνησεν ἡ τῆς βίβλου ἀνάγνωσις , δεῖξον ἐπὶ τῆς πράξεως. Εἰ δὲ μένεις ἐφ᾽ ὧν ἐκείνη καταηγορεί, φαίνῃ καταγινώσκων αὐτῆς. Καὶ πάντως ἐπὶ τούτοις ἡμεῖς οὔτε φθεγξόμεθά τι πρὸς σὲ διὰ γράμματος, οὔτε βιβλίον αἰτοῦντι παράσχωμεν, εἰ μὴ καὶ τῆς προτέρας καρπὸν θεασώμεθα. Ἅγιος Ἰσίδωρος Του Πηλουσιώτου, Βιβλίον Πρῶτον, Ἐπιστολὴ ΥΠΑ' Ἱερωνι Source: Migne 78.444d

If you have plucked some fruit from the reading of the book, show it in deeds. But if you remain as one whom it denounces, you seem to scorn it. And certainly because of such things we shall not speak to you through letters, nor attend to your requests for books, not until you we see some fruit. Saint Isidore of Pelusium, Book 1, Letter 481, to Hiero