1 John 1:7-9

Verse 7

But if we walk in the light - If, having received the principle of holiness from him, we live a holy and righteous life, deriving continual light, power, and life from him, then we have fellowship one with another; that is, we have communion with God, and God condescends to hold communion with us. This appears to be the intention of the apostle; and so he was understood by some versions and MSS., which, instead of μετ' αλληλων, with each other, have μετ' αυτον, with him. Those who are deeply experienced in Divine things converse with God, and God with them. What John says is no figure; God and a holy heart are in continual correspondence.

The blood of Jesus Christ - The meritorious efficacy of his passion and death has purged our consciences from dead works, and cleanseth us, καθαριζει ἡμας, continues to cleanse us, i.e., to keep clean what it has made clean, (for it requires the same merit and energy to preserve holiness in the soul of man, as to produce it), or, as several MSS. and some versions read, καθαριει and καθαρισει, will cleanse; speaking of those who are already justified, and are expecting full redemption in his blood.

And being cleansed from all sin is what every believer should look for, what he has a right to expect, and what he must have in this life, in order to be prepared to meet his God. Christ is not a partial Savior, he saves to the uttermost, and he cleanses from All sin.
Verse 8

If we say that we have no sin - This is tantamount to 1Jn 1:10 : If we say that we have not sinned. All have sinned, and come short of the glory of God; and therefore every man needs a Savior, such as Christ is. It is very likely that the heretics, against whose evil doctrines the apostle writes, denied that they had any sin, or needed any Savior. In deed, the Gnostics even denied that Christ suffered: the Aeon, or Divine Being that dwelt in the man Christ Jesus, according to them, left him when he was taken by the Jews; and he, being but a common man, his sufferings and death had neither merit nor efficacy.

We deceive ourselves - By supposing that we have no guilt, no sinfulness, and consequently have no need of the blood of Christ as an atoning sacrifice: this is the most dreadful of all deceptions, as it leaves the soul under all the guilt and pollution of sin, exposed to hell, and utterly unfit for heaven.

The truth is not in us - We have no knowledge of the Gospel of Jesus, the whole of which is founded on this most awful truth - all have sinned, all are guilty, all are unholy; and none can redeem himself. Hence it is as necessary that Jesus Christ should become incarnated, and suffer and die to bring men to God.
Verse 9

If we confess our sins - If, from a deep sense of our guilt, impurity, and helplessness, we humble ourselves before God, acknowledging our iniquity, his holiness, and our own utter helplessness, and implore mercy for his sake who has died for us; he is faithful, because to such he has promised mercy, Psa 32:5; Pro 28:13; and just, for Christ has died for us, and thus made an atonement to the Divine justice; so that God can now be just, and yet the justifier of him who believeth in Jesus.

And to cleanse us from all unrighteousness - Not only to forgive the sin, but to purify the heart.

Observe here,

1. Sin exists in the soul after two modes or forms: (1.) In guilt, which requires forgiveness or pardon. (2.) In pollution, which requires cleansing.

2. Guilt, to be forgiven, must be confessed; and pollution, to be cleansed, must be also confessed. In order to find mercy, a man must know and feel himself to be a sinner, that he may fervently apply to God for pardon; in order to get a clean heart, a man must know and feel its depravity, acknowledge and deplore it before God, in order to be fully sanctified.

3. Few are pardoned, because they do not feel and confess their sins; and few are sanctified or cleansed from all sin, because they do not feel and confess their own sore, and the plague of their hearts.

4. As the blood of Jesus Christ, the merit of his passion and death, applied by faith, purges the conscience from all dead works, so the same cleanses the heart from all unrighteousness.

5. As all unrighteousness is sin, so he that is cleansed from all unrighteousness is cleansed from all sin. To attempt to evade this, and plead for the continuance of sin in the heart through life, is ungrateful, wicked, and even blasphemous; for as he who says he has not sinned, 1Jn 1:10, makes God a liar, who has declared the contrary through every part of his revelation; so he that says the blood of Christ either cannot or will not cleanse us from all sin in this life, gives also the lie to his Maker, who has declared the contrary, and thus shows that the word - the doctrine of God is not in him.

Reader, it is the birthright of every child of God to be cleansed from all sin, to keep himself unspotted from the world, and so to live as never more to offend his Maker. All things are possible to him that believeth; because all things are possible to the infinitely meritorious blood and energetic Spirit of the Lord Jesus. See the notes on the parallel passages in the margin; and particularly in St. John's gospel, John 1 note.

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