What does the Bible say about Antichrist?

The term Antichrist is used in 1 John to refer to those who oppose the Messiah. In 1 John 2:18-20, it is stated that there are already many Antichrists, which indicates the last times since various false teachers have departed from the doctrine of Christ. Those who deny that Jesus is the Messiah and who distort His work are seen as Antichrists. The spirit of Antichrist is characterized by the denial of Christ's incarnation and a reliance on works for salvation, which is in direct opposition to the true gospel of grace that emphasizes salvation through faith in Christ alone.