εἰ μὴ ἦλθον καὶ ἐλάλησα αὐτοῖς, ἁμαρτίαν οὐκ εἶχον → if I had not come and spoken to them, they would not be guilty of sin
(see also: ἐπικωλύω) hinder, prevent
impedire, to hinder, impede, 6.17.6.
