There is no perfect security in this world. We could each construct for ourselves a Howard Hughes bubble against every conceivable threat. We would still be vulnerable, and we ourselves would become the ultimate victims of our isolation. The world is a complicated place, and answers to its problems are typically complicated. The desire for easy answers usually produces bad answers. Acting out of undifferentiated fear is one of the worst. We can do better. Indeed, as believers we are commanded to do so.