Shared ground
Paul ends this section with a simple rule: if someone is going to speak with pride or confidence, that “boast” is to be “in the Lord” (), not centered on the self. He then gives the reason: self-commendation () does not establish the approval that counts. The decisive verdict belongs to the Lord.
In context, this is not abstract advice about feelings. It addresses public credibility—whose claims and credentials should be taken seriously in the community—especially when leaders are competing for trust.
Where interpretation differs
Who “the Lord” is in this line. Some read “the Lord” as specifically Jesus (consistent with Paul’s frequent use of “Lord” for Jesus). Others read it as God more generally. Either way, the point in the sentence stays the same: the reference point for any legitimate “boast” is not the speaker.
What kind of “approval” is meant. Some read “approved” () mainly as God’s final evaluation. Others think it includes (or even emphasizes) the present, practical recognition of genuine ministry in the church, since Paul is arguing about which leaders should be trusted.
Why the disagreement exists
The key terms are broad. “Lord” can refer to God or to Jesus in Paul’s letters, and “approved” can describe tested genuineness in more than one setting. Also, Paul is dealing with a real community dispute, which naturally raises both “before God” and “in the church” questions at the same time.
What this passage clearly contributes
Explicitly, the text makes two paired contrasts: (1) boasting can happen, but its legitimate orientation is “in the Lord,” not self-focused; (2) self-commendation does not create true standing, because the commendation that matters comes from the Lord. By closing this way, Paul sets a measuring line for evaluating public claims: the decisive validation is external to the self, and it belongs to the Lord (2 Corinthians 10:17–18).