But if we walk in the light, as he is in the light, we have fellowship with one another, and the blood of Jesus Christ, his Son, cleanses us from all sin.

 (ii) The man who denies that Jesus is the Christ is a liar ( 1 John 2:22). Here is something which runs through the whole New Testament. The ultimate test of any man is his reaction to Jesus. The ultimate question which Jesus asks every man is: "Who do you say that I am?" ( Matthew 16:13). A man confronted with Christ cannot but see the greatness that is there; and, if he denies it, he is a liar. 