18 And a little after he says, “For as touching the ministering to the saints, it is superfluous for me to write to you. For I know the forwardness of your mind, for which I boast of you to them of Macedonia, that Achaia was ready a year ago; and your zeal has provoked very many. Yet have we sent the brethren, lest our boasting of you should be in vain in this behalf; that, as I said, you may be ready: lest haply if they of Macedonia come with me, and find you unprepared, we (that we say not, ye) should be ashamed in this substance.
Therefore I thought it necessary to exhort the brethren, that they would go before unto you, and make up beforehand this your long promised benediction, that the same might be ready, as benediction, and not as covetousness. But this I say, He which sows sparingly shall reap also sparingly; and he which sows in benediction shall reap also in benediction. Every man according as he has purposed in his heart, not grudgingly, or of necessity: for God loves a cheerful giver. And God is able to make all grace abound in you; that you, always having all sufficiency in all things, may abound to every good work: as it is written, He has dispersed abroad; he has given to the poor: his righteousness remains for ever.
But He that ministers seed to the sower will both minister bread for your food, and multiply your seed sown, and increase the growing fruits of your righteousness; that you may be enriched in every thing to all bountifulness, which causes through us thanksgiving to God: for the administration of this service not only supplies the want of the saints, but makes them also to abound by thanksgiving unto God of many, while by the proof of this ministration they glorify God for the obedience of your confession unto the Gospel of Christ, and for your liberal distribution unto them, and unto all men; and in the praying for you of them which long after you for the excellent grace of God in you.
Thanks be unto God for His unspeakable gift.” In what richness of holy gladness must the Apostle have been steeped, while he speaks of the mutual supply of the need of Christ's soldiers and His other subjects, on the one part of carnal things to those, on the other of spiritual things to these, to exclaim as he does, and as it were in repletion of holy joys to burst out with, “Thanks be to God for His unspeakable gift!”
Source: On the Work of Monks (New Advent)