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."
"It is the divine allergy to moral evil, the reaction of righteousness to unrighteousness. God is neither easily angered nor vindictive. But by his very nature he is unalterably committed to opposing and judging all disobedience." [Note: Tenney, "John," pp. 52-53.] 