Jesus Came to Destroy the Works of the Devil, the Works of Sin

Then, in the second part of verse 8, John says, “The reason the Son of God appeared was to destroy the works of the devil.”  And the specific focus John has in mind when he says “works of the devil” is the sin that the devil promotes. We see this in the first part of verse 8: “Whoever makes a practice of sinning is of the devil, for the devil has been sinning from the beginning.” So the works of the devil that Jesus came to destroy are the works of sin. - John Piper, Finally Alive, p. 65-66.