As a very specific statement, this could make sense, if you delete "ethical." The life promised by this gospel is eternal, not ephemeral, but it does begin here. We live, as Plato discerned, in a metaxy, in between. Or, as C.S. Lewis had it, in the Shadowlands. Or, perhaps even Tolkien, in Middle Earth.
To a Christian, freedom means the very opposite of alienated autonomy -- it means heirship in the Kingdom, entering into a living, mystical union with the sovereign King who's no longer subject but Master. To paint such a union as merely ethical is to miss the point entirely.