How close do we dare to get to Jesus' Sermon on the Mount? It's widely considered the key to understanding who Jesus was and what mission he strove to fulfill. For two millennia, countless people have wrestled to apply it, from Augustine to Luther to Tolstoy to Gandhi. Alongside much wisdom, there has been much evasion, prompting Jewish theologian Pinchas Lapide's tart comment: "The history of the impact of the Sermon on the Mount can largely be described...