Fasting and Abuse

Εἰ νηστεύεις ἀπὸ βρωμάτων, τί κρεωφαγείς λοιδορίας; Καλὸν γὰρ ἐκείνων ἐμφορεῖσθαι, ἢ ταύταις βεβληλοῦσθαι. Εἰ δὲ τῶν μὲν ἀπέχῃ, ταῖς δὲ μολύνῃ ἔοικάς τινι μικρὰ προσευχομένῳ καὶ πλεῖστα βλασφημοῦντι. Ἅγιος Ἰσίδωρος Του Πηλουσιώτου, Βιβλιον Πρῶτον, Ἐπιστολή ΥΜϚ', Παλλαδιῳ

If you are fasting from food, why eat the meat of abuse? For it is better to partake of the former than to be corrupted by the latter. If from the former you abstain but by the latter you are defiled you seem to be like one who prays a little but is ever full of blasphemous speech. Saint Isidore of Pelusium, Book 1, Letter 446, To Palladius