On the last day of the US Civil War, officer Joshua Chamberlain was in command of the Union army. His soldiers lined up on both sides of the road that the Confederate army had to march down in surrender. One wrong word or one belligerent act and the longed-for peace could be turned to slaughter. In an act as brilliant as it was moving, Chamberlain ordered his troops to salute their foe! No taunting here, no vicious words—only guns in salute and swords raised to honor.

When Jesus offered His words about forgiveness in Luke 6, He was helping us understand…