2 for I know your eagerness, about which I boast of you to the Macedonians, that Achaia 2 has been ready since last year; and your zeal has stirred up most of them.
3 Nonetheless, I sent the brothers 3 so that our boast about you might not prove empty in this case, so that you might be ready, as I said,
5 So I thought it necessary to encourage the brothers to go on ahead to you and arrange in advance for your promised gift, so that in this way it might be ready as a bountiful gift and not as an exaction.
6 Consider this: whoever sows sparingly will also reap sparingly, and whoever sows bountifully will also reap bountifully.
8 4 Moreover, God is able to make every grace abundant for you, so that in all things, always having all you need, you may have an abundance for every good work.
11 5 You are being enriched in every way for all generosity, which through us produces thanksgiving to God,
1 [1-15] Quite possibly this was originally an independent letter, though it deals with the same subject and continues many of the same themes. In that case, it may have been written a few weeks later than 2 Cor 8, while the delegation there mentioned was still on its way.
3  I sent the brothers: the Greek aorist tense here could be epistolary, referring to the present; in that case Paul would be sending them now, and 2 Cor 9:9 would merely conclude the letter of recommendation begun in 2 Cor 9:8. But the aorist may also refer to a sending that is past as Paul writes; then 2 Cor 9:9, with its apparently fresh beginning, is a follow-up message entrusted to another carrier.
4 [8-10] The behavior to which he exhorts them is grounded in God's own pattern of behavior. God is capable of overwhelming generosity, as scripture itself attests (2 Cor 9:9), so that they need not fear being short. He will provide in abundance, both supplying their natural needs and increasing their righteousness. Paul challenges them to godlike generosity and reminds them of the fundamental motive for encouragement: God himself cannot be outdone.
5 [11-15] Paul's vision broadens to take in all the interested parties in one dynamic picture. His language becomes liturgically colored and conveys a sense of fullness. With a final play on the words charis and eucharistia (see the note on 2 Cor 8:1), he describes a circle that closes on itself: the movement of grace overflowing from God to them and handed on from them through Paul to others is completed by the prayer of praise and thanksgiving raised on their behalf to God.