2 Corinthians 9:2

Forwardness of your mind. Paul addresses himself to the best element in the Corinthian church, confident that they are thinking rightly about the matter. As a wise Christian leader he takes notice of every favorable sign, in the hope of strengthening what gives promise of success. The wise minister of the gospel will similarly stimulate the best that is in people, whether as individuals or as a group.

I boast of you. See on verse 1.

Achaia. In Roman times southern Greece constituted the province of Achaia, of which Corinth was the capital. There were already several Christian churches in this region, that at Corinth being the principal one. There was also a church at Cenchreae, one of the ports of Corinth (see Romans 16:1). See The Journeys of Paul.

Your zeal. Paul expresses complete assurance in the Corinthian church as to their part in the offering, and boasts of it as if it were an accomplished fact. They could not go back on their word now without embarrassing themselves and denying all the good things Paul had said concerning them. The appeal to a good example sometimes succeeds when other methods have failed. Many do not believe that they can afford to give, until others in similar circumstances demonstrate their generosity.