of Western Christianity, as, for instance, it reappears in the correspondence between Harnack and Peterson. Peterson, in thanking Harnack for his essay on “The Old Testament in the Pauline Epistles and the Pauline Communities”, also pointed out that Harnack, in the account he gave of the relationship between Scripture and scriptural interpretation, was articulating, not the Protestant, but the Catholic principle. Harnack replied, “It is a truism, that the so-called ‘formal principle’ of early Protestantism
Page 46