he that believeth on the son of God, hath the testimony of God thereto: he that does not believe God, impeaches his veracity, because he does not believe the testimony that God gave of his son.

he that receives the son, is intitled to life; and he that does not receive the son of God, has no title to life.

We know that the son of God is come, and hath given us an understanding to know him that is true: and we are with him that is true, by his son Jesus Christ. "he is the true God, who is the author of eternal life."