The deep revelation and mystery of the gospel is not just that “God so loved the world,” (John 3:16), but that “God is Love” (1 John 4:8). Love is not merely what God has or does or shows; love is what God is within God’s own being.
We can see what this divine love looks like in God’s act of giving his only begotten Son for the sake of the world. Love is self-giving and other-centered. Love is cross-shaped. The apostle Paul gives us a profound description of divine love in 1 Corinthians:
Love is patient, love is kind. It does not envy, it does not boast, it is not proud. It does not dishonor others, it is not self-seeking, it is not easily angered, it keeps no record of wrongs. Love does not delight in evil but rejoices with the truth. It always protects, always trusts, always hopes, always perseveres. Love never fails. (1 Corinthians 13:4-8)
Now, notice that retribution has no place in this description. It is not merely indifferent to love, it is antithetical to love. Love is not self-seeking; retribution is. Love keeps no record of wrongs, is not resentful; retribution takes careful note in order to pay back, to take revenge. Love seeks what is good for the sake of the other; retribution seeks vengeance for one’s own sake.
God is love, and love is simply not retributive. Yes, there is divine wrath and divine judgment, but these are not for the purpose of retribution; they have a very different end in view. In the hands of angry men, wrath and judgment are destructive, but in the hands of divine love, their ultimate purpose is not destruction but restoration. And, yes, there is divine vengeance, but the way God — the way Love — pays back is very different from the way of the world.
Do not repay anyone evil for evil. Be careful to do what is right in the eyes of everyone. If it is possible, as far as it depends on you, live at peace with everyone. Do not take revenge, my dear friends, but leave room for God’s wrath, for it is written: “It is mine to avenge; I will repay,” says the Lord. On the contrary: “If your enemy is hungry, feed him; if he is thirsty, give him something to drink. In doing this, you will heap burning coals on his head.” Do not be overcome by evil, but overcome evil with good. (Romans 12:17-21)
Paul instructs us here on how we should live. He is not telling us to be different from our heavenly Father, or from our Lord Jesus Christ, who is the express manifestation of the Father. No, he is showing us what God is like. God does not pay back evil with evil, but overcomes evil with good.
The Greek word for “revenge” and “avenge” in this passage are not about settling old scores — as least not in hands of God — but about putting things right, with nothing missing or broken. So, God repays evil with good, for as Paul says earlier in this letter, it is the goodness of God that leads to repentance (Romans 2:4).
God overcomes evil with good, just as Paul instructs us to do. Though there is yet much evil in the world, God has already acted to overcome it all by the Cross and Resurrection of our Lord Jesus Christ. The expectation of the Christian faith is that we shall see the full manifestation of that great victory.
For more on this, see The Surprising Vengeance of God.