When God says, “Vengeance is mine; I will repay” (Deut. 32:35; Rom. 12:19; Heb. 10:30), He means it. We can take matters into our own hands and enact a form of justice on those who commit evil against us and our people, but we can only right the wrong done to us. Our acts of justice don’t vindicate God and bring Him honor and glory.
We see the intersection of vengeance and mercy in the 10th plague on Egypt, memorialized in the annual remembrances of Passover and Unleavened Bread, two key lessons in the Torah reading בוא Bo (“come,” Exodus 10:1-13:16).
They also are key lessons that teach us about the Messiah in the Gospels.