The apostle in these verses attests their integrity by the sincerity of their conversation. This he does not in a way of boasting and vain-glory, but as one good reason for desiring the help of prayer, as well as for the more comfortably trusting in God (Heb 13:18), and for the necessary vindication of himself from the aspersions of some persons at Corinth, who reproached his person and questioned his apostleship. Here,

I.He appeals to the testimony of conscience with rejoicing (Co2 1:12), in which observe, 1. The witness appealed to, namely, conscience, which is instead of a thousand witnesses. This God's deputy in the soul, and the voice of conscience is the voice of God. They rejoiced in the testimony of conscience, when their enemies reproached them, and were enraged against them. Note, The testimony of conscience for us, if that be right and upon good grounds, will be matter of rejoicing at all times and in all conditions. 2. The testimony this witness gave. And here take notice, Conscience witnessed, (1.) Concerning their conversation, their constant course and tenour of life: by that we may judge of ourselves, and not by this or that single act. (2.) Concerning the nature or manner of their conversation; that it was in simplicity and godly sincerity. This blessed apostle was a true Israelite, a man of plain dealing; you might know where to have him. He was not a man who seemed to be one thing and was another, but a man of sincerity. (3.) Concerning the principle they acted from in all their conversation, both in the world and towards these Corinthians; and that was not fleshly wisdom, nor carnal politics and worldly views, but it was the grace of God, a vital gracious principle in their hearts, that cometh from God, and tendeth to God. Then will our conversation be well ordered when we live and act under the influence and command of such a gracious principle in the heart.

II.He appeals to the knowledge of the Corinthians with hope and confidence, Co2 1:13, Co2 1:14. Their conversation did in part fall under the observation of the Corinthians; and these knew how they behaved themselves, how holily, and justly, and unblamably; they never found any thing in them unbecoming an honest man. This they had acknowledged in part already, and he doubted not but they would still do so to the end, that is, that they would never have any good reason to think or say otherwise of him, but that he was an honest man. And so there would be mutual rejoicing in one another. We are your rejoicing, even as you also are ours in the day of the Lord Jesus. Note, It is happy when ministers and people do rejoice in each other here; and this joy will be complete in that day when the great Shepherd of the sheep shall appear.

For our rejoicing is this - Ἡ καυχησις. Our boasting, exultation, subject of glorying.

The testimony of our conscience - Μαρτυριον της συνειδησεως· That testimony or witness which conscience, under the light and influence of the Spirit of God, renders to the soul of its state, sincerity, safety, etc.

In simplicity - Ἁπλοτητι· from α, denoting unity or together, and πελω, to be; or from α, negative, and πολυς, many; not compounded, having one end in view, having no sinister purpose, no by end to answer. Instead of ἁπλοτητι, many MSS. and versions have ἁγιοτητι, holiness.

In godly sincerity - Ειλικρινειᾳ Θεου· The sincerity of God: that is, such a sincerity as comes from his work in the soul. Ειλικρινεια, sincerity, and ειλικρινης, sincere, come from ειλη, the splendor, or bright shining of the sun; and here signifies such simplicity of intention, and purity of affection, as can stand the test of the light of God shining upon it, without the discovery being made of a single blemish or flaw.

Not with fleshly wisdom - The cunning and duplicity of man, who is uninfluenced by the Spirit of God, and has his secular interest, ease, profit, pleasure, and worldly honor in view.

But by the grace of God - Which alone can produce the simplicity and godly sincerity before mentioned, and inspire the wisdom that comes from above.

We have had our conversation - Ανεστραφημεν· We have conducted ourselves. The word properly refers to the whole tenor of a man's life - all that he does says, and intends; and the object or end he has in view, and in reference to which he speaks, acts, and thinks; and is so used by the best Greek writers. The verb αναστρεφω is compounded of ανα, again, and στρεφω, to turn; a continual coming back again to the point from which he set out; a circulation; beginning, continuing, and ending every thing to the glory of God; setting out with Divine views, and still maintaining them; beginning in the Spirit, and ending in the Spirit; acting in reference to God, as the planets do in reference to the sun, deriving all their light, heat, and motion from him; and incessantly and regularly revolving round him. Thus acted Paul; thus acted the primitive Christians; and thus must every Christian act who expects to see God in his glory. The word conversation is not an unapt Latinism for the Greek term, as conversatio comes from con, together, and verto, I turn; and is used by the Latins in precisely the same sense as the other is by the Greeks, signifying the whole of a man's conduct, the tenor and practice of his life: and conversio astrorum, and conversiones caelestes, is by Cicero used for the course of the stars and heavenly bodies. - De Leg. c. 8: Caelum una conversione atque eadem, ipse circum se torquetur et vertitur. - CIC de Univers., c. 8: "The heaven itself is, with one and the same revolution, whirled about, and revolves round itself."

In the world - Both among Jews and Gentiles have we always acted as seeing Him who is invisible.

More abundantly to you-ward - That is, We have given the fullest proof of this in our conduct towards you; You have witnessed the holy manner in which we have always acted; and God is witness of the purity of the motives by which we have been actuated; and our conscience tells us that we have lived in uprightness before him.

For our rejoicing is this, the testimony of our conscience,.... This rejoicing or glorying of the apostle's in the testimony of their consciences, to the goodness of their hearts, actions, conduct, and behaviour, was not before God, and in his sight, but before men, who were ready to accuse their good conversation in Christ: nor are these words to be considered as they generally are by interpreters, as if it was the testimony of a good conscience, which was the ground of their faith and confidence, that God would deliver them, and was an helping cause, together with the prayers of the saints, of their present deliverance. They refer to the charge exhibited against the apostle, that he had falsified his word in not coming to Corinth according to his promise; under which charge he could sit easy, having a witness within him, which was better than a thousand others, that

we have had our conversation in the world, and more abundantly to you-wards; the Corinthians, of which they themselves must be conscious:

in simplicity; in opposition to double mindedness; they did not say one thing, and mean another, and act contrary to both; their heart and mouth went together, and their conduct agreed with both; what they promised they meant to perform; and where there was a want of performance, it was owing to intervening providences, which hindered, and not to any deceitfulness in them: the conscience of the apostle bore him witness, that he behaved in the simplicity and singleness of his heart; and also in

godly sincerity, or "in the sincerity of God"; that is, such as God requires, gives, and approves of, and which will stand in his sight, will bear his examination, and to which he gives his testimony; and that his conduct was

not influenced

with fleshly wisdom: he used no artful sophistical methods to impose upon, and delude persons, for any sinister ends, or worldly advantage:

but by the grace of God; which was bestowed upon him, implanted in him, and which taught him to deny ungodliness and worldly lusts, and to live soberly, righteously, and godly in this world.

For--reason why he may confidently look for their prayers for him.

our rejoicing--Greek, "our glorying." Not that he glories in the testimony of his conscience, as something to boast of; nay, this testimony is itself the thing in which his glorying consists.

in simplicity--Most of the oldest manuscripts read, "in holiness." English Version reading is perhaps a gloss from Eph 6:5 [ALFORD]. Some of the oldest manuscripts and versions, however, support it.

godly sincerity--literally, "sincerity of God"; that is, sincerity as in the presence of God (Co1 5:8). We glory in this in spite of all our adversities. Sincerity in Greek implies the non-admixture of any foreign element. He had no sinister or selfish aims (as some insinuated) in failing to visit them as he had promised: such aims belonged to his adversaries, not to him (Co2 2:17). "Fleshly wisdom" suggests tortuous and insincere courses; but the "grace of God," which influenced him by God's gifts (Rom 12:3; Rom 15:15), suggests holy straightforwardness and sincere faithfulness to promises (Co2 1:17-20), even as God is faithful to His promises. The prudence which subserves selfish interests, or employs unchristian means, or relies on human means more than on the Divine Spirit, is "fleshly wisdom."

in the world--even in relation to the world at large, which is full of disingenuousness.

more abundantly to you-ward-- (Co2 2:4). His greater love to them would lead him to manifest, especially to them, proofs of his sincerity, which his less close connection with the world did not admit of his exhibiting towards it.