There are four keywords here, translated as "trespass/sins," "tell him his fault/point out their fault," "between," and "gain/won them over," that Jesus only uses a few times. By looking at all his uses of these words--something the biblical translators don't seem to have done--we can get a better sense of how he uses these words: "err," "accuse," "separating," and "win."
Of course, the word translated as "trespass/sin" is one of the most interesting, if only because Jesus uses this verb so seldom, only seven times. "Sinning" was clearly not as big a factor in Jesus's teaching as it is in modern Christianity. See this article for more.
The "hear" verb also means "to be silent," which makes it kind of funny. The "you/to you" is in the form that indicates who is heard from, not what is heard about.
Christ's Words in Matthew as a Guide to 40 Days of Prayer.