Who is the liar but he who denies that Jesus is the Christ? This is the Antichrist, he who denies the Father and the Son.
By the definite article, the liar, the lie is set forth in its concrete personality: the one who impersonates all that is false, as antichrist represents every form of hostility and opposition to Christ. The denial that Jesus is the Christ is the representative falsehood. He that denies is the representative liar (339).