Karl Barth's Theology of the Reformed Confessions characterised those catechetical texts as more ethical in orientation and more horizontal in focus than the corresponding Lutheran symbols. By examining both primary and secondary sources, this paper shows that while Barth legitimately illumines a key element of the Reformed witness regarding a connection between faith and life, his polemical eye may also distort his perspective on its distinctiveness, likely owing to contextual factors related to his self-fashioning a Reformed identity in his early academic service at the predominantly Lutheran University of Göttingen and alongside his colleague, Emanuel Hirsch.

It has been commonplace for over a century to argue that the distinctively Lutheran form of the communicatio idiomatum leads naturally to kenotic christology, divine passibility, or both. Although this argument has been generally accepted as a historical claim, has also been advanced repeatedly as a criticism of ‘classical theism’ and has featured significantly in almost all recent defences of divine passibility, I argue that it does not work: the Lutheran scholastics had ample resources drawn from nothing more than ecumenical trinitarian and christological dogma to defend their denial of the genus tapeinoticum. I argue further that this defence, if right, undermines a remarkably wide series of proposals in contemporary systematic theology.