‏ Matthew 18:15

 If thy brother sin against thee ( εαν αμαρτηση αδελφος σου ). Literally, commit a sin (ingressive aorist subjunctive of  αμαρτανω ). Aleph B Sahidic do not have "against thee" ( εις σε ).

 Shew him his fault ( ελεγξον ). Such private reproof is hard to do, but it is the way of Christ.

 Thou hast gained ( εκερδησας ). Aorist active indicative of  κερδαινω in conclusion of a third-class condition, a sort of timeless aorist, a blessed achievement already made.

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