Abstract
With a view to the theme of Church renewal, this article explores the role of a wellknown and popular phrase in the Reformed tradition within Protestantism, i.e. ecclesia reformata semper reformanda (‘the reformed Church should always be reformed’). Is this a helpful slogan when considering the pros and cons, the possibilities and the limitations of Church renewal? First, the historical background of this phrase is described: it is rooted in the Dutch Reformed tradition, and only in the twentieth century was it widely recognized in Reformed circles. Against this background the hermeneutical problem, linked with the principle of sola Scriptura, is presented, and put into an ecumenical perspective: the Church as grounded in the gospel. Finally, the article focuses on Church polity as an important field of renewal, taking into account Karl Barth’s interpretation of this phrase. From this perspective, a balanced and ecumenical approach of Church renewal is possible.