20KJV: 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.
Geneva: But we know that that Sone of God is come, & hath giue vs a mind to know him, which is true: & we are in him that is true, that is, in that his Sone Iesus Christ: this same is that very God, and that eternal life.