Every once in a while when I served as a parish pastor, I would joke with colleagues or parishioners that stewardship would be a lot easier had it not been for Martin Luther. When they gave me a slightly confused look, I would say that I just thought it would be easier to raise money if I could threaten my people with hell, or at least with purgatory, rather than assure them they were justified by faith rather than their good works. Just to be clear, it really was a joke in that I am regularly and incredibly grateful for the Lutheran witness to God’s grace and the promise that we are, indeed, justified by grace through faith rather than...