You can either click here and read it, or look at the quote below, which ruins the surprise but saves you time:
But there is another lesson that we can learn from this advertisement. It is to have more confidence in our own Christian culture. So often we ape the world and its culture, instead of confidently asserting our own. Here is a song that if we were asked to sing in church, Christians would complain: ‘It is too old fashioned’, ‘does not communicate with the modern age’, ‘is musically very limited’, etc. Yet the world of big advertising budgets listens to that song and hears such a powerful communication possibility, that they make it central to their promotion.