He who believes in the Son of God possesses that testimony within himself; he who will not believe God, has made God a liar by refusing to believe the testimony which God has borne to his Son.

We know that the Son of God has come, and has given us insight to know Him who is the Real God; and we are in Him who is real, even in his Son Jesus Christ. This is the real God, this is life eternal.

Whoever confesses that 'Jesus is the Son of God,' in him God remains, and he remains in God;

This is how the love of God has appeared for us, by God sending his only Son into the world, so that by him we might live.

If we accept human testimony, God's testimony is greater; for God's testimony consists in his testimony to his Son.