One who believes in the Son has eternal life, but one who disobeys{The same word can be translated "disobeys" or "disbelieves" in this context.} the Son won't see life, but the wrath of God remains on him."
In this pericope the Apostle John explained that Jesus came from heaven with greater authority than any former prophet. What He revealed came from His own observations in heaven. His words accurately and fully represented God. Moreover He came because the Father fully endowed Him with divine authority and assistance out of love. Furthermore He is to be the object of people’s faith. Therefore He was superior to John the Baptist as well as every other divine representative.