John Wesley on 1 John 5:19

We know that we are children of God - By the witness and the fruit of his Spirit, 1John 3:24. But the whole world - All who have not his Spirit, not only is "touched" by him, but by idolatry, fraud, violence lasciviousness, impiety, all manner of wickedness. Lieth in the wicked one - Void of life, void of sense. In this short expression the horrible state of the world is painted in the most lively colours; a comment on which we have in the actions, conversations, contracts, quarrels, and friendships of worldly men.