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.
"The principle source of confusion in much contemporary study of 1 John is to be found in the failure to recognize the real danger against which the writer is warning. The eternal salvation of the readership is not imperilled [sic]. It is not even in doubt as far as the author is concerned. But seduction by the world and its antichristian representatives is a genuine threat which must be faced." [Note: Hodges, The Gospel . . ., p. 55.] 