1 John 5:20 - The Son of God has come and has given us understanding

We know also that the Son of God has come and has given us understanding, so that we may know him who is true. And we are in him who is true-even in his Son Jesus Christ. He is the true God and eternal life.

And we know that the Son of God is come, and hath given us an understanding, that we may know him that is true, and we are in him that is true, even in his Son Jesus Christ. This is the true God, and eternal life.

And we know that the Son of God has come, and has given us understanding so that we may know Him who is true; and we are in Him who is true, in His Son Jesus Christ. This is the true God and eternal life.

1 John 5:20

Commentary

The coming of the Lord Jesus revealed to us Him who is true, that is, the true God. God the Father can only be known through the Lord Jesus Christ. Jesus said, "No one comes to the Father except through Me." John is teaching what the Gnostics denied, namely, that Jesus Christ is God, and that eternal life is found only in Him.

MacDonald, W., & Farstad, A. (1997, c1995). Believer's Bible Commentary : Old and New Testaments (1 Jn 5:20). Nashville: Thomas Nelson.

Gnosticism - a Heretical movement in the early Christian centuries that emphasized salvation through a secret gnosis or knowledge. Originating as perversion of Jewish and Christian truths, it developed into an independent religious phenomenon.

Kurian, G. T. (2001). Nelson's new Christian dictionary : The authoritative resource on the Christian world. Nashville, Tenn.: Thomas Nelson Pubs.