Shared ground
Paul is addressing lawsuits between members of the Corinthian church. He says plainly that he aims to make them feel shame (an honor-and-reputation signal in their setting), because their behavior contradicts what they claim to value: wisdom and mature judgment.
A key point in the text is public exposure. The conflict is not only “brother against brother,” but it is happening “before unbelievers,” meaning outsiders are watching the community handle its disputes in a way that looks inconsistent and damaging.
Paul also makes an evaluative claim: the mere existence of these lawsuits is already a “defect” among them. That is, regardless of who is right in a given case, the community has already failed at some level by reaching this stage.
Where interpretation differs (only where needed)
How wide Paul’s prohibition is. Some readers take Paul to be rejecting any use of public courts by believers against believers. Others think he is addressing a narrower set of cases—routine, money/property, or status-driven disputes—rather than every possible situation.
How “why not rather be wronged/defrauded” functions. Some read these lines as Paul’s preferred norm: accepting loss is better than escalating conflict through litigation. Others read them as rhetorical pressure meant to shock, not as a universal rule for every kind of harm.
What “before unbelievers” emphasizes most. Many see a main concern as witness: outsiders see Christians treating each other like rivals. Others emphasize competence and authority: Paul wants internal resolution because outsiders are not the right people to judge disputes within the community.
Why the disagreement exists
Paul does not specify the exact nature of the cases in view (“what kinds of disputes”), nor does he list exceptions. He speaks in broad, forceful questions and assumes a shared church life where internal mediation is possible. That leaves readers to infer how the principle applies when disputes involve different levels of harm, public responsibility, or lack of safety.
What this passage clearly contributes
Explicitly, the passage asserts that (1) Paul intends to shame the community for these lawsuits, (2) internal wisdom should be sufficient to decide disputes, (3) taking a fellow believer to court before outsiders is scandalous, (4) the existence of lawsuits already signals a serious failing, and (5) Paul points to absorbing loss (“be wronged…be defrauded”) as the better alternative. Theologically inferred, Paul treats the church as a family-like community (“brothers,” adelphos) whose unity and public credibility matter, and he prioritizes reconciled relationships over winning disputes.