The social gospel is not an addendum to the gospel; it is the gospel. If we read the Gospels, it becomes clear that it was not what Jesus said about God that got him into trouble (but) his treatment of men and women, his way of being friendly with outcasts with whom no respectable Jew would have anything to do. It has always been fairly safe to talk about God; it is when we start to talk about men that the trouble starts. And yet the fact remains that there is no conceivable way of proving that we love God other than by loving men. And there is no conceivable way of proving that we love men than by doing something for those who most need help.
William Barclay (1907-1978), Ethics in a Permissive Society [1971]