"If we confess our sins, he is faithful and just to forgive us our sins, and to cleanse us from all unrighteousness." 1 John 1:9
Has the Lord made sin your burden? Has he ever made you feel guilty before him? Has he ever pressed down your conscience with a sight and sense of your iniquities, your sins, your backslidings? And does the Lord draw, from time to time, honest, sincere, unreserved confession of those sins out of your lips? What does the Holy Ghost say to you? What has the blessed Spirit recorded for your instruction, and for your consolation? "If we confess our sins, he is faithful and just to forgive us our sins." Not merely on a footing of mercy; still less because you confess them. It is not your confessing them, but it is thus—your confessing them is a mark of divine light; your confessing them springs from the work of grace upon your heart.
If, then, you possess divine life, if you have grace in your soul, you are a child of God, Jesus obeyed for you—Jesus suffered for you—Jesus died for you—Jesus has put away your sin. And, therefore, you being a child of God, and Jesus having done all these things for you, God is now "faithful" to his promise that he will receive a confessing sinner; and "just" to his own immutable and veracious character. And thus, from justice as well as mercy, from faithfulness as well as compassion, he can, he will, and he does pardon, forgive, and sweetly blot out every iniquity and every transgression of a confessing penitent.