What does 2 Corinthians 9:3 mean?
It was Paul's boasting about the Corinthians' early enthusiasm for a collection to help believers in Jerusalem that motivated other churches to get involved, as well (2 Corinthians 9:2). Now, a year has passed. Those other churches have made their contributions, and the Corinthians have not. This may be because of tensions that have arisen between some of them and Paul. It might simply be a matter of distance and difficulty.Whatever the cause, Paul is now, in a sense, forcing their hand. He is sending "the brothers" to make sure their contribution is ready when he arrives to receive it. The brothers include Titus, Paul's partner in ministry, and two representatives from those other churches that have already made their contributions.
Paul hopes that the Corinthians will really, truly prove to be ready to make their contribution as he has boasted they would be. Otherwise, his compliments on their behalf will prove to have been empty.