A profound understanding and fear of God’s wrath is exactly what many [people] need, because without it, the gospel is diluted down to mere human relations and loses its biblical glory. Without a biblical view of God’s wrath, you will be tempted to think that your wrath – your anger – against your [enemy] is simply too big to overcome, because you have never really tasted what it is like to see an infinitely greater wrath overcome by grace, namely, God’s wrath against you.
John Piper