2 Corinthians 3:3

Forgetting the false teachers, Paul goes on to the heart of the matter and expounds the difference between the two Testaments.

Now we have not received this longing from God on the condition that it should not or could not ever be satisfied.… So when even in this life men devote themselves with great labor to sacred and religious studies, although they obtain only some small fragments out of the immeasurable treasures of divine knowledge, yet [they gain this advantage, that] they occupy their mind and understanding with these questions and press onward in their eager desire. Moreover they derive much assistance from the fact that by turning their mind to the study and love of truth they render themselves more capable of receiving instruction in the future. For when one wishes to paint a picture, if he first sketches with the faint touch of a light pencil the outlines of the proposed figure and inserts suitable marks to indicate features afterward to be added, this preliminary drawing with its faint outline undoubtedly renders the canvas more prepared to receive the true colors. So it will be with us, if only that faint form and outline is inscribed "on the tablets of our heart" by the pencil of our Lord Jesus Christ.… It is clear, then, that to those who have now in this life a kind of outline of truth and knowledge there shall be added in the future the beauty of the perfect image.

As the pen is an instrument for writing when the hand of an experienced person moves it to record what is being written, so also the tongue of the just man, when the Holy Spirit moves it, writes the words of eternal life in the hearts of the faithful, dipped "not in ink but in the Spirit of the living God." The scribe, therefore, is the Holy Spirit, because he is wise and an apt teacher of all. And the Spirit writes swiftly, because the movement of his mind is swift. The Spirit writes thoughts in us, "not on tablets of stone but on fleshy tablets of the heart." In proportion to the size of the heart, the Spirit writes in hearts more or less, either things evident to all or things more obscure, according to the heart's previous purity. Because of the speed with which the writings have been finished, all the world now is filled with the gospel.

Then exalting them still higher, he even calleth them the epistle of Christ, saying, "Being made manifest that ye are an epistle of Christ." And having said this, he afterwards hence takes ground and occasion for a discussion on the Law. And there is another aim in his here styling them His epistle. For above as commending him, he called them an epistle; but here an epistle of Christ, as having the Law of God written in them. For what things God wished to declare to all and to you, these are written in your hearts. But it was we who prepared you to receive the writing. For just as Moses hewed the stones and tables, so we, your souls. Whence he saith, "Ministered by us." Yet in this they were on an equality; for the former were written on by God, and these by the Spirit. Where then is the difference? "Written not with ink, but with the Spirit of the living God; not in tables of stone, but in tables that are hearts of flesh." Wide as the difference between the Spirit and ink, and a stony table and a fleshy, so wide is that between these and those; consequently between themselves who ministered, and him who ministered to them.

In what way? In that the law of Christ and His commandments, like written letters, abide and are preserved in you. Having taken the opportunity to compare the Law with the Gospel, he makes here such a comparison: as Moses was a minister of the …

Then he explains how this letter is known, saying, you show that you are a letter from Christ, and in regard to this he does three things. First, he explains whose letter it is; secondly, how it was written; thirdly, on what. He shows whose …

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.

Manifestly declared to be the letter of Christ - Which he has formed and published to the world. Ministered by us - Whom he has used herein as his instruments, therefore ye are our letter also.

Forasmuch as ye are manifestly declared,....

Compare 2Co 3:2, "As ye are our Epistle written in our hearts," so Christ has in the first instance made you "His Epistle written with the Spirit in (on) your hearts." I bear on my heart, as a testimony to all men, that which Christ has by His Spirit written in your heart [ALFORD].

Manifestly declared to be the epistle of Christ - Ye are in our hearts, and Christ has written you there; but yourselves are the epistle of Christ; the change produced in your hearts and lives, and the salvation which you have received, are as truly the work of Christ as a letter dictated and written by a man in his work. Ministered by us - Ye are the writing, but Christ used me as the pen; Christ dictated, and I wrote; and the Divine characters are not made with ink, but by the Spirit of the living God; for the gifts and graces that constitute the mind that was in Christ are produced in you by the Holy Ghost. Not in tables of stone - Where men engrave contracts, or record events; but in fleshly tables of the heart - the work of salvation taking place in all your affections, appetites, and desires; working that change within that is so signally manifested without. See the parts of this figurative speech: 1. Jesus Christ dictates. 2. The apostle writes. 3. The hearts of the Corinthians are the substance on which the writing is made. And, 4. The Holy Spirit produces that influence by which the traces are made, and the mark becomes evident. Here is not only an allusion to making inscriptions on stones, where one dictates the matter, and another cuts the letters; (and probably there were certain cases where some colouring matter was used to make the inscription the more legible; and when the stone was engraved, it was set up in some public place, as monuments, inscriptions, and contracts were, that they might be seen, known, and read of all men); but the apostle may here refer to the ten commandments, written by the finger of God upon two tables of stone; which writing was an evidence of the Divine mission of Moses, as the conversion of the Corinthians was an evidence of the mission of St. Paul. […]

Forasmuch as ye are manifestly declared - You are made manifest as the epistle of Christ; or you, being made manifest, are the epistle, etc. They had been made manifest to be such by their conversion. The sense is, it is plain, or evident, that ye are the epistle of Christ. To be the epistle of Christ - That which Christ has sent to be our testimonial. He has given this letter of recommendation.