The one who continues to sin is of the devil (diabolou | διαβόλου | gen sg masc), because the devil (diabolos | διάβολος | nom sg masc) has been sinning from the beginning. The Son of God appeared for this purpose — that he might destroy the works of the devil (diabolou | διαβόλου | gen sg masc).
Reference
1 John 3:8
Sequence
28