He who sins is of the devil, for the devil has been sinning from the beginning. To this end the Son of God was revealed, that he might destroy the works of the devil.

 3:3-8 Anyone who rests this hope on him purifies himself as he is pure. Anyone who commits sin commits lawlessness, and sin is lawlessness. And you know that he appeared that he might take away our sins and there is no sin in him. Anyone who abides in him does not sin. Anyone who sins has not seen him, and does not know him. Little children, let no one deceive you. He who does righteousness is righteous, even as he is righteous. He who does sin is of the devil, because the devil is a sinner from the beginning. The purpose for which the Son of God appeared was that he might destroy the works of the devil. 