Sin and Neighbours

Λέγουσι δὲ ἐν ταϊς Παραδόσεσι Ματθίαν τὸν ἀπόστολον παρ' ἕκαστα εἰρηκένι, ὅτι, ' Ἐὰν ἐκλεκτοῦ γείτων ἁμαρτήσῃ, ἥμαρτεν ὁ ἐκλεκτός· εἰ γὰρ οὕτως ἑαυτὸν ἦγεν ὡς ὁ Λόγος ὑπαγορεύει, κατῃδέσθη ἄν αὐτοῦ τὸν βίον καὶ ὁ γείτων εἰς τὸ μὴ ἁμαρτεῖν.' Κλήμης ὁ Ἀλεξανδρεύς, Στρωματεων, Λόγος Ἑβδομος, Κεφ ΙΓ'

They say in The Traditions that Matthias the Apostle constantly said, 'If the neighbour of an elect man sin, the elect man has sinned, for if he had  conducted himself as the Word commands, his neighbour in awe of his life would not have sinned.' Clement of Alexandria, Stromata, Book 7, Ch 13.