2 Corinthians / Question
Paul says boasting belongs to the Lord, not self-promotion. He adds that the one who is approved is not the one who commends himself, but the one whom the Lord commends. See 2 Corinthians 10:17–18.
In 2 Corinthians 10:17–18 Paul closes this part of his argument with a rule about boasting. If anyone is going to speak proudly, the only proper focus is “the Lord,” not the self. He then gives a reason: self-praise does not establish real approval. These lines conclude Paul’s discussion in chapter 10 about how he and his opponents should be measured. He has been challenging a style of leadership that relies on showy self-presentation, comparisons, and letters of recommendation.
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” (lord), not centered on the self. He then gives the reason: self-commendation (commending) does not establish the approval that counts. The decisive verdict belongs to the Lord.
A careful answer keeps the immediate passage, the book's argument, and the whole-Bible storyline together, so the question is answered in context instead of as a detached idea.
Start with 2 Corinthians 10:17-18, then read the surrounding section so the answer stays connected to the passage's flow.
17But "he who boasts, let him boast in the Lord."
18For it isn’t he who commends himself who is approved, but whom the Lord commends.