If we claim "We have not sinned," we are making Him a liar, and His message is not in our hearts.

Whoever says, "I know Him," but does not practice obedience to His commands is a liar, and there is no truth in his heart;

because everything that is in the world, the things that our lower nature and eyes are longing for, and the proud pretensions of life, do not come from the Father, but from the world;

Who is the notorious liar, if it is not the man who denies that Jesus is the Christ? He is the real Antichrist, the man who disowns the Father and the Son.

If anyone says, "I love God," and yet habitually hates his brother, he is a liar; for whoever does not love his brother whom he has seen cannot love God whom he has not seen.

Whoever believes in the Son of God has this testimony in his own heart. Whoever does not believe God has made Him a liar, because he has not believed the testimony that God has borne to His Son.