Hard To Heal

Τὰ ἀνιαρὰ, διὰ τὰς προσγεγενυμένας ἁμαρτίας ἐπέρχονται πάσης πλημμελείας τὸ προσφυὲς ἐπικομίζοντα Ἅγιος Μάρκος ὁ Ἐρημίτης, Περὶ Τῶν Οἰομένων Ἐξ Ἔργων Δικαιοῦσθαι Source: Migne PG 65.952d

Hard to heal are sins that have become firmly fixed, with every error bringing more natural attachment. Saint Mark The Ascetic, On Those Who Think Themselves Justified By Works