In his 1942 novel, “The Screwtape Letters,” author C.S. Lewis makes an important observation on the nature of courage. He argues that all spiritual virtues — such as love, hope, faith, patience, and mercy — have little meaning if they disappear in the face of danger or persecution. It is easy to be kind, forgiving, or strong when times are good, but retaining those qualities during times of adversity requires great courage.