1 John 3:8 He who sins is of the devil, for the devil has sinned from the beginning. For this purpose the Son of God was manifested, that He might destroy the works of the devil.
We all sin! What is John talking about? Im born again of God. John is making a general statement of all humanity before the factor of Jesus Christ. Before the only solution to mankind that was sold under sin. Those who practice sin. Good news, Jesus destroyed the works of the devil. The word for devil is diablos which means slanderor & accuser. Jesus destroyed the slander & accusations of satan. That is only part of the good news.