“I’m not surprised you lead retreats,” said an acquaintance in my exercise class. “You have a good aura.” I was jolted but pleased by her comment, because I realized that what she saw as an “aura” in me, I understood to be the peace of Christ. As we follow Jesus, He gives us the peace that transcends understanding (Phil. 4:7) and radiates from within—though we may not even be aware of it.

Jesus promised His followers this peace when, after their last supper together, He prepared them for His death and resurrection. He told them that though they would have trouble…