Shared ground
Paul is defending his integrity, not merely explaining a travel mix‑up. He reminds the Corinthians that he did have a real plan to see them, and that the plan was shaped “in this confidence” (tied to his earlier claim of openness and sincerity in 1:12–14). The basic facts he gives are clear: he intended an initial visit, then travel on to Macedonia, then return to Corinth, and then be helped on his way toward Judea.
Paul also treats the criticism as serious: a changed plan has been taken as evidence that he is unreliable or self‑serving. His questions in v.17 show the charge: that he “purposes” (purpose) like someone driven by mere human impulse, so that his “yes” and “no” cancel each other out.
Where interpretation differs (only where needed)
What “second benefit” means. Some read it narrowly: the “benefit” is two personal visits (a first and then another), so “second benefit” is simply “another visit.” Others read it more broadly: the “benefit” includes what his presence would produce (encouragement, help, progress), and “second” points to an added advantage from the planned two‑stop pattern, not just a headcount of visits.
How morally loaded “according to the flesh” is here. Some understand Paul to be denying a serious moral fault (manipulating plans for selfish ends). Others take it as denying ordinary human fickleness and inconsistency (unsteady decision‑making), even if no scheme is intended.
Why the disagreement exists
The phrases Paul uses are compact and relationally charged. “Second benefit” is not defined in these verses, so interpreters must infer it from the itinerary and from the letter’s larger tension. Likewise, “according to the flesh” can describe either self‑interested motives or merely human ways of operating, and v.17 is written as sharp questions rather than a detailed explanation.
What this passage clearly contributes
This paragraph contributes a concrete picture of Paul’s intended movements (Corinth → Macedonia → Corinth → Judea) and shows that his credibility is under attack at the level of motives, not just scheduling. Explicitly, Paul insists he had a deliberate plan and rejects the idea that his planning works like contradictory talk—“yes” and “no” at the same time. Theologically (by inference), the passage highlights that Christian leadership and ministry relationships depend heavily on perceived trustworthiness, and that Paul frames practical decisions as connected to the integrity he has already claimed in 2 Corinthians 1:12–14 and will continue to defend in 2 Corinthians 1:18–22.