In the tenth chapter of Romans, the Apostle Paul also spoke of this confession of the Lord Jesus Christ, resulting in salvation and righteousness… or as John said, cleansed from all unrighteousness. This is when we experience new life and receive the forgiveness that God has offered back at the cross of Christ. Clearly, the target audience in the first chapter of 1 John was aimed at unbelieving people who denied they have sinned… they needed to realize they had fallen short, confess it and be transferred into the light of Christ. The “verse” of 1 John 1:9 is not an admonition for believers in Christ to admit to God they have committed yet another sin while seeking a new forgiveness. After all, forgiveness is not offered without the shedding of blood, and Jesus offer Himself once, for all.
We have a better confession inside of a new and better covenant where Jesus is our guarantee: “Let us hold fast the confession of our hope without wavering, for He who promised is faithful” (Hebrews 10:23 NASB).