In these verses the apostle speaks very respectfully to the Corinthians, and with great skill; and, while he seems to excuse his urging them so earnestly to charity, still presses them thereto, and shows how much his heart was set upon this matter.
I. He tells them it was needless to press them with further arguments to afford relief to their poor brethren (Co2 9:1), being satisfied he had said enough already to prevail with those of whom he had so good an opinion. For, 1. He knew their forwardness to every good work, and how they had begun this good work a year ago, insomuch that, 2. He had boasted of their zeal to the Macedonians, and this had provoked many of them to do as they had done. Wherefore he was persuaded, that, as they had begun well, they would go on well; and so, commending them for what they had done, he lays an obligation on them to proceed and persevere.
II. He seems to apologize for sending Titus and the other brethren to them. He is unwilling they should be offended at him for this, as if he were too earnest, and pressed too hard upon them; and tells the true reasons why he sent them, namely, 1. That, having this timely notice, they might be fully ready (Co2 9:3), and not surprised with hasty demands, when he should come to them. When we would have others to do that which is good we must act towards them prudently and tenderly, and give them time. 2. That he might not be ashamed of his boasting concerning them, if they should be found unready, Co2 9:3, Co2 9:4. He intimates that some from Macedonia might haply come with him: and, if the collection should not then be made, this would make him, not to say them, ashamed, considering the boasting of the apostle concerning them. Thus careful was he to preserve their reputation and his own. Note, Christians should consult the reputation of their profession, and endeavour to adorn the doctrine of God our Saviour.

Whereof ye had notice before - Instead of προκατηγγελμενην, spoken of before, BCDEFG, several others, with the Coptic, Vulgate, Itala, and several of the fathers, have προεπηγγελμενην, what was promised before. The sense is not very different; probably the latter reading was intended to explain the former. See the margin.
Bounty, and not as of covetousness - Had they been backward, strangers might have attributed this to a covetous principle; as it would appear that they were loth to give up their money, and that they parted with it only when they could not for shame keep it any longer. This is the property of a covetous heart; whereas readiness to give is the characteristic of a liberal mind. This makes a sufficiently plain sense; and we need not look, as some have done, for any new sense of πλεονεξια, covetousness, as if it were here to be understood as implying a small gift.

Therefore I thought it necessary to exhort the brethren,.... Titus, and the other two, on whom he did not lay his commands, or apostolical injunctions, according to the authority and dignity of his office; only exhorted or besought them, and which was judged by him very needful and proper at this time:

that they would go before hand unto you; before him, and the Macedonian brethren that might probably come with him:

and make up before hand your bounty; or blessing; for any present sent, or delivered, by one person to another, as a token of their friendship, favour, and good will, whether in a necessitous case or not, was by the Jews called "a blessing"; see Gen 33:11 and especially what is contributed for the relief of the poor may be so called, because it is not only a part of the bounty of Providence, and blessings of life, with which men are favoured; but is also one way of blessing God for the mercies he has blessed them with, and likewise of blessing, or doing good to fellow creatures and Christians. Moreover, because for this the poor bless their benefactors; and it is a blessing itself to do good to others. Now the apostle judged it expedient to send the brethren before hand to complete and finish this good work begun.

Whereof, says he,

ye had notice before: in his former epistle, Co1 16:1 or which was promised before by them; or had been spoken of so much before by him to other churches:

that the same might be ready, as a matter of bounty, or blessing,

not as of covetousness; that is, that the collection being ready made, largely and liberally, it might appear to be a free generous action, and show what a noble bountiful disposition they were of; and not performed as covetous men usually do what they do, sparingly, tenaciously, keeping their money as long as they can, being loath to part with it.

that they would go before--Translate, "that they should," &c.

whereof ye had notice before--rather, "promised before"; "long announced by me to the Macedonians" (Co2 9:2) [BENGEL]. "Your promised bounty" [ELLICOTT and others].

not as of covetousness--Translate, "not as matter of covetousness," which it would be, if you gave niggardly.