The apostle, having intimated that there may be, even among us, such a privilege as an assurance or sound persuasion of heart towards God, proceeds here,

I.To establish the court of conscience, and to assert the authority of it: For, if our heart condemn us, God is greater than our heart, and knoweth all things, Jo1 3:20. Our heart here is our self-reflecting judicial power, that noble excellent ability whereby we can take cognizance of ourselves, of our spirits, our dispositions, and actions, and accordingly pass a judgment upon our state towards God; and so it is the same with conscience, or the power of moral self-consciousness. This power can act as witness, judge, and executioner of judgment; it either accuses or excuses, condemns or justifies; it is set and placed in this office by God himself: the spirit of man, thus capacitated and empowered, is the candle of the Lord, a luminary lighted and set up by the Lord, searching all the inward parts of the belly, taking into scrutiny and viewing the penetralia - the private recesses and secret transactions of the inner man, Pro 20:27. Conscience is God's vicegerent, calls the court in his name, and acts for him. The answer of a good conscience towards God, Pe1 3:21. God is chief Judge of the court: If our heart condemn us God is greater than our heart, superior to our heart and conscience in power and judgment; hence the act and judgment of the court are the act and judgment of God; as, 1. If conscience condemn us, God does so too: For, if our heart condemn us, God is greater than our heart, and knoweth all things, Jo1 3:20. God is a greater witness than our conscience, and knoweth more against us than it does: he knoweth all things; he is a greater Judge than conscience; for, as he is supreme, so his judgment shall stand, and shall be fully and finally executed. This seems to be the design of another apostle when he says, For I know nothing by myself, that is, in the case wherein I am censured by some. "I am not conscious of any guile, or allowed unfaithfulness, in my stewardship and ministry. Yet I am hereby justified; it is not by my own conscience that I must ultimately stand or fall; the justification or justifying sentence of my conscience, or self-consciousness, will not determine the controversy between you and me; as you do not appeal to its sentence, so neither will you be determined by its decision; but he that judgeth me (supremely and finally judgeth me), and by whose judgment you and I must be determined, is the Lord," Co1 4:4. Or, 2. If conscience acquit us, God does so too: Beloved, if our heart condemn us not, then have we confidence toward God (Jo1 3:21), then have we assurance that he accepts us now, and will acquit us in the great day of account. But, possibly, some presumptuous soul may here say, "I am glad of this; my heart does not condemn me, and therefore I may conclude God does not." As, on the contrary, upon the foregoing verse, some pious trembling soul will be ready to cry out, "God forbid! My heart or conscience condemns me, and must I then infallibly expect the condemnation of God?" But let such know that the errors of the witness are not here reckoned as the acts of the court; ignorance, error, prejudice, partiality, and presumption, may be said to be faults of the officers of the court, or of the attendants of the judge (as the mind, the will, appetite, passion, sensual disposition, or disordered brain), or of the jury, who give a false verdict, not of the judge itself; conscience - suneidēsis, is properly self-consciousness. Acts of ignorance and error are not acts of self-consciousness, but of some mistaken power; and the court of conscience is here described in its process, according to the original constitution of it by God himself, according to which process what is bound in conscience is bound in heaven; let conscience therefore be heard, be well-informed, and diligently attended to.

II.To indicate the privilege of those who have a good conscience towards God. They have interest in heaven and in the court above; their suits are heard there: And whatsoever we ask we receive of him, Jo1 3:22. It is supposed that the petitioners do not desire, or do not intend to desire, any thing that is contrary to the honour and glory of the court or to their own intended spiritual good, and then they may depend upon receiving the good things they ask for; and this supposition may well be made concerning the petitioners, or they may well be supposed to receive the good things they ask for, considering their qualification and practice: Because we keep his commandments, and do those things that are pleasing in his sight, Jo1 3:22. Obedient souls are prepared for blessings, and they have promise of audience; those who commit things displeasing to God cannot expect that he should please them in hearing and answering their prayers, Psa 66:18; Pro 28:9.

If our heart condemn us - If we be conscious that our love is feigned, we shall feel inwardly condemned in professing to have what we have not. And if our heart condemn us, God is greater than our heart, for he knows every hypocritical winding and turning of the soul, he searches the heart, and tries the reins, and sees all the deceitfulness and desperate wickedness of the heart which we cannot see, and, if we could see them, could not comprehend them; and as he is the just Judge, he will condemn us more strictly and extensively than we can be by our own conscience.

Beloved, if our heart condemn us not,.... Which must be understood, not of a stupidity of mind, as is in unregenerate men, who have no sense of sin, no sorrow for it, or remorse of conscience on account of it; or as is in them who are past feeling; having their consciences seared as with a red hot iron; such cannot be entitled to the advantages that follow; nor is it of persons the apostle speaks, but of himself, and Christians, the beloved of the Lord, and one another, who had an experience of the grace of God upon their souls, and made a profession of religion: nor does it design such a purity of heart and life in believers, as that their hearts do not smite, reproach, and condemn them for sin at any time, for such a state of perfection is not to be attained to and expected in this life; but rather a conscience purged by the blood of Christ, or an heart sprinkled from an evil conscience by that blood, which speaks peace and pardon, so that there is no more conscience of sin, for the removal of which that is applied; and this gives boldness and confidence at the throne of grace: though it is best of all to confine it to the case of brotherly love; for the sense is not, if our heart condemn us not of anything but of the want of brotherly love, or insincerity in it,

then have we confidence towards God; or with him, at the throne of his grace: such can draw nigh to him, and stand before him with an holy and humble confidence, when such as hate the brethren, as Cain did, in whom the apostle instances, and those that go in his way, cannot; whose heart condemned him, his conscience smote him, and he went from the presence of the Lord; but those that love the brethren have confidence of their relation to God; by this they know their regeneration, and by that their adoption, and so that they are the children of God; and can therefore draw nigh to God as their Father, and call him so; they can come with an holy boldness and intrepidity of mind before him, and use a "freedom of speech", with him; can tell him all their mind, pour out their souls unto him, and lay before him their case and wants; they have confidence of his power, faithfulness, and willingness to supply their need, and fulfil all his promises to them, and that their prayers will be heard, answered, and regarded by him in his own time.

LUTHER and BENGEL take this verse as consoling the believer whom his heart condemns; and who, therefore, like Peter, appeals from conscience to Him who is greater than conscience. "Lord, Thou knowest all things: thou knowest that I love Thee." Peter's conscience, though condemning him of his sin in denying the Lord, assured him of his love; but fearing the possibility, owing to his past fall, of deceiving himself, he appeals to the all-knowing God: so Paul, Co1 4:3-4. So if we be believers, even if our heart condemns us of sin in general, yet having the one sign of sonship, love, we may still assure our hearts (some oldest manuscripts read heart, Jo1 3:19, as well as Jo1 3:20), as knowing that God is greater than our heart, and knoweth all things. But thus the same Greek is translated "because" in the beginning, and "(we know) that" in the middle of the verse, and if the verse were consolatory, it probably would have been, "Because EVEN if our heart condemn us," &c. Therefore translate, "Because (rendering the reason why it has been stated in Jo1 3:19 to be so important to 'assure our hearts before Him') if our heart condemn (Greek, 'know [aught] against us'; answering by contrast to 'we shall know that we are of the truth') us (it is) because God is greater than our heart and knoweth all things." If our heart judges us unfavorably, we may be sure that He, knowing more than our heart knows, judges us more unfavorably still [ALFORD]. A similar ellipsis ("it is") occurs in Co1 14:27; Co2 1:6; Co2 8:23. The condemning testimony of our conscience is not alone, but is the echo of the voice of Him who is greater and knoweth all things. Our hypocrisy in loving by word and tongue, not in deed and truth, does not escape even our conscience, though weak and knowing but little, how much less God who knows all things! Still the consolatory view may be the right one. For the Greek for "we shall assure our hearts" (see on Jo1 3:19), is gain over, persuade so as to be stilled, implying that there was a previous state of self-condemnation by the heart (Jo1 3:20), which, however, is got over by the consolatory thought, "God is greater than my heart" which condemns me, and "knows all things" (Greek "ginoskei," "knows," not "kataginoskei," "condemns"), and therefore knows my love and desire to serve Him, and knows my frame so as to pity my weakness of faith. This gaining over the heart to peace is not so advanced a stage as the having CONFIDENCE towards God which flows from a heart condemning us not. The first "because" thus applies to the two alternate cases, Jo1 3:20-21 (giving the ground of saying, that having love we shall gain over, or assure our minds before Him, Jo1 3:19); the second "because" applies to the first alternate alone, namely, "if our heart condemn us." When he reaches the second alternate, Jo1 3:21, he states it independently of the former "because" which had connected it with Jo1 3:19, inasmuch as CONFIDENCE toward God is a farther stage than persuading our hearts, though always preceded by it.