IN THE WORLD OF advertising, every copywriter knows the power of two magic words: "Free!" and "New!" We see them in the supermarket, in the newspaper, on billboards. And consumers respond. In the church today, we are falling prey to the appeal of "New!" The old truths of the gospel don't seem spectacular enough. We're restless for the latest, greatest, newest teaching or technique. We pastors in particular seem to search for a shortcut or some dynamic new strategy that will fire up our churches.