God is not a liar
8–10. If we say that we have no sin. To say that we have reached a sinless state in which we no longer need the blood of Christ to cleanse us is a deception. This language is in square opposition to the claims of the “Perfectionists” of all ages. 9. If we confess our sins. Instead of affirming that we are sinless we should confess our sins. Faithful and just. If we confess our sins the Lord will be faithful to his promise of mercy, and just in requiring us to have the atonement of Christ, to forgive us our sins. 10. If we say that we have not sinned. God says we have sinned. He declares “There is none righteous; no, not one.” Hence, if we affirm that we are sinless we make God a liar.
Johnson, B. W. (1891). The people’s New Testament: with explanatory notes (1 Jn 1:5–10). St. Louis, MO: Christian Publishing Company.