"As the leader of Wilshire Boulevard Temple, one of America's largest and most important congregations, located in the heart of Los Angeles, Rabbi Leder has witnessed a lot of pain: "It's my phone that rings when people's bodies or lives fall apart," he writes. "The couch in my office is often drenched with tears." After 27 years of listening, comforting, and holding so many who suffered, he thought he understood pain and its challenges--but when...