Source: The Washington Post By E.J. Dionne Jr. Opinion writer It is a mark of our pluralistic moment that I learned of an old joke among rabbis from the writings of a great Christian scholar, Jaroslav Pelikan. In his book “Jesus Through the Centuries,” Pelikan tells the story of a rabbi who is challenged by one of his pupils: “Why is it that you rabbis so often put your teaching in the form of a question?” To which the rabbi replies: “So what’s wrong with a question?” Trying to imagine what will matter in a new year is daunting, but…