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.

 2:1-2 My little children, I am writing these things to you that you may not sin. But, if anyone does sin, we have one who will plead our cause to the Father, Jesus Christ the righteous. For he is the propitiating sacrifice for our sins, and not for ours only but also for the whole world. 