If you know that he is righteous, you know that everyone who practices righteousness is born of him.

 John has a view of Antichrist which is characteristically his own. To him the sign that Antichrist is in the world is the false belief and the dangerous teaching of the heretics. The Church had been well forewarned that in the last days false teachers would come. Jesus had said, "Many will come in my name, saying, I am he; and they will lead many astray" ( Mark 13:6; compare Matthew 24:5). Before he left them, Paul had warned his Ephesian friends: "After my departure fierce wolves will come in among you, not sparing the flock. And from among your own selves will arise men, speaking perverse things, to draw away the disciples after them" ( Acts 20:29-30). The situation which had been foretold had now arisen. 