Should Americans be prohibited from practicing their faith while serving in the military? The Supreme Court ought to take up Sterling v. U.S., which presents exactly that question. Around 2013, the plaintiff, Lance Cpl. Monifa Sterling, had displayed a Bible verse above her desk. It was a message from Isaiah: “No weapon formed against me shall prosper.” That small act of religious devotion mattered to her, but the military considered it inappropriate. Her superiors ordered her to take it down. When she refused, the quotation was removed by a superior. Lance Cpl. Sterling was court-martialed and discharged from the Marines, in part for her refusal to remove the biblical message.