In this sentence, we have the concluding remark of a two-chapter exhortation from the Apostle Paul to the Corinthian church. At the time of this letter, the Jerusalem church was in a large-scale financial trial, likely due to persecution, famine, and perhaps a bit of negligence, and the Corinthian church had pledged some support. Paul had already collected some funds from other churches (the Macedonians), but now he heard that the Corinthians were thinking about neglecting their promised contribution, so he wrote 2 Corinthians 8-9 to them. As I said, it was an exhortation, particularly to be generous and give.