If we say, "We have not sinned," we are making him a liar, and his word is not in us.

He who says, "I know Him," but does no continue obeying his commandments, is a liar,

Who is the liar if not the man who denies that Jesus is the Christ? This is the Antichrist, even he who disowns the Father and the Son.

If any one says, "I love God," and yet hates his brother, he is a liar; for he who does not love his brother whom he has seen, cannot possibly love God, whom he has not seen.

He who believes on the Son of God has the testimony in himself. He who does not believe God, has made him a liar, because he has not believed in the testimony that God has borne concerning his Son.