In these verses,

I.The apostle makes an apology for seeming to commend himself. He thought it convenient to protest his sincerity to them, because there were some at Corinth who endeavoured to blast his reputation; yet he was not desirous of vain-glory. And he tells them, 1. That he neither needed nor desired any verbal commendation to them, nor letters testimonial from them, as some others did, meaning the false apostles or teachers, Co2 3:1. His ministry among them had, without controversy, been truly great and honourable, how little soever his person was in reality, or how contemptible soever some would have him thought to be. 2. The Corinthians themselves were his real commendation, and a good testimonial for him, that God was with him of a truth, that he was sent of God: You are our epistle, Co2 3:2. This was the testimonial he most delighted in, and what was most dear to him - they were written in his heart; and this he could appeal to upon occasion, for it was, or might be, known and read of all men. Note, There is nothing more delightful to faithful ministers, nor more to their commendation, than the success of their ministry, evidenced in the hearts and lives of those among whom they labour.

II.The apostle is careful not to assume too much to himself, but to ascribe all the praise to God. Therefore, 1. He says they were the epistle of Christ, Co2 3:3. The apostle and others were but instruments, Christ was the author of all the good that was in them. The law of Christ was written in their hearts, and the love of Christ shed abroad in their hearts. This epistle was not written with ink, but with the Spirit of the living God; nor was it written in tables of stone, as the law of God given to Moses, but on the heart; and that heart not a stony one, but a heart of flesh, upon the fleshy (not fleshly, as fleshliness denotes sensuality) tables of the heart, that is, upon hearts that are softened and renewed by divine grace, according to that gracious promise, I will take away the stony heart, and I will give you a heart of flesh, Eze 36:26. This was the good hope the apostle had concerning these Corinthians (Co2 3:4) that their hearts were like the ark of the covenant, containing the tables of the law and the gospel, written with the finger, that is, by the Spirit, of the living God. 2. He utterly disclaims the taking of any praise to themselves, and ascribes all the glory to God: "We are not sufficient of ourselves, Co2 3:5. We could never have made such good impressions on your hearts, nor upon our own. Such are our weakness and inability that we cannot of ourselves think a good thought, much less raise any good thoughts or affections in other men. All our sufficiency is of God; to him therefore are owing all the praise and glory of that good which is done, and from him we must receive grace and strength to do more." This is true concerning ministers and all Christians; the best are no more than what the grace of God makes them. Our hands are not sufficient for us, but our sufficiency is of God; and his grace is sufficient for us, to furnish us for every good word and work.

Ye are our epistle - I bear the most ardent love to you. I have no need to be put in remembrance of you by any epistles or other means; ye are written in my heart - I have the most affectionate remembrance of you.

Known and read of all men - For wherever I go I mention you; speak of your various gifts and graces; and praise your knowledge in the Gospel.

Ye are our epistle,.... Here a reason is given why they stood in no need of letters of commendation, to or from the church at Corinth, because that church was their living epistle, and which was much preferable to any written one. The apostle calls them their epistle in the same sense, as they are said to be his "work in the Lord, and the seal of his apostleship", Co1 9:1 they were so as persons regenerated by the Spirit and grace of God, in whose conversion he was an instrument; now it was the work of conversion in them, which was the epistle said to be

written in our hearts; some think it should be read, "in your hearts"; and so the Ethiopic version reads it; and it looks as if it should be so read, from the following verse, and from the nature of the thing itself; for the conversion of the Corinthians was not written in the heart of the apostle, but in their own; and this was so very notorious and remarkable, that it was

known and read of all men; everyone could read, and was obliged to acknowledge the handwriting; it was so clear a case, what hand the apostle, as an instrument, had in the turning of these persons from idols to serve the living God; and which was so full a proof of the divinity, efficacy, truth, and sincerity of his doctrine, that he needed no letters from any to recommend him.

our epistle--of recommendation.

in our hearts--not letters borne merely in the hands. Your conversion through my instrumentality, and your faith which is "known of all men" by widespread report (Co1 1:4-7), and which is written by memory and affection on my inmost heart and is borne about wherever I go, is my letter of recommendation (Co1 9:2).

known and read--words akin in root, sound, and sense (so Co2 1:13). "Ye are known to be my converts by general knowledge: then ye are known more particularly by your reflecting my doctrine in your Christian life." The handwriting is first "known," then the Epistle is "read" [GROTIUS] (Co2 4:2; Co1 14:25). There is not so powerful a sermon in the world, as a consistent Christian life. The eye of the world takes in more than the ear. Christians' lives are the only religious books the world reads. IGNATIUS [Epistle to the Ephesians, 10] writes, "Give unbelievers the chance of believing through you. Consider yourselves employed by God; your lives the form of language in which He addresses them. Be mild when they are angry, humble when they are haughty; to their blasphemy oppose prayer without ceasing; to their inconsistency, a steadfast adherence to your faith."