I John 1:9

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, Jo1 1:10,…

confess--with the lips, speaking from a contrite heart; involving also confession to our fellow men of offenses committed against them. he--God. faithful--to His own promises; "true" to His word. just--Not merely the mercy, but the justice or righteousness of God is set forth in the redemption of the penitent believer in Christ. God's promises of mercy, to which He is faithful, are in accordance with His justice. to--Greek, "in order that." His forgiving us our sins and cleansing us, &c., is in furtherance of the ends of His eternal faithfulness and justice. forgive--remitting the guilt. cleanse--purify from all filthiness, so that henceforth we more and more become free from the presence of sin through the Spirit of sanctification (compare Heb 9:14; and above, see on Jo1 1:7). unrighteousness--offensive to Him who "is just" or righteous; called "sin," Jo1 1:7, because "sin is the transgression of the law," and the law is the expression of God's righteousness, so that sin is unrighteousness.

If we confess our sins,.... Not to one other; for though it is our duty to confess our faults to our fellow creatures and fellow Christians which are committed against them, yet are under no obligation to confess such as are more immediately against God, and which lie between him and ourselves; or at least it is sufficient to confess and acknowledge in general what sinful creatures we are, without entering into particulars; for confession of sin is to be made to God, against whom it is committed, and who only can pardon: and a man that truly confesses his sin is one that the Spirit of God has convinced of it, and has shown him its exceeding sinfulness, and filled him with a godly sorrow for it, and given him repentance unto salvation, that needeth not to be repented of; and who, under such a sight and sense of sin, and concern for it, comes and acknowledges it before the Lord, humbly imploring, for Christ's sake, his pardoning grace and mercy; and such obtain it: he is faithful and just to forgive us our sins: forgiveness of sin here intends not the act of forgiveness, as in God, proceeding upon the bloodshed and sacrifice of Christ, which is done at once, and includes all sin, past, present, and to come; but an application of pardoning grace to a poor sensible sinner, humbled under a sense of sin, and confessing it before the Lord; and confession of sin is not the cause or condition of pardon, nor of the manifestation of it, but is descriptive of the person, and points him out, to whom God will and does make known his forgiving love; for to whomsoever he grants repentance, he gives the remission of sin; in doing of which he is faithful to his word of promise; such as in Pro 28:13; "and just"; in being "true", as the Arabic version adds, to his word; and showing a prope…

Evidence given concerning Christ's person and excellency (Jo1 1:1, Jo1 1:2). The knowledge thereof gives us communion with God and Christ (Jo1 1:3), and joy (Jo1 1:4). A description of God (Jo1 1:5). How we are thereupon to walk (Jo1 1:6). The benefit of such walking (Jo1 1:7). The way to forgiveness (Jo1 1:9). The evil of denying our sin (Jo1 1:8-10).

1:9 To maintain continual fellowship with God, we need to confess our sins to him. Forgiveness and cleansing are guaranteed because God is faithful to his promises and because he acts on the basis of his justice. Christ’s death for our sins fulfills God’s justice and acquits us of our guilt.