The numerous testaments on papyrus provide a valuable basis for an investigation of legal language around διαθήκη in the Pauline letters. Of particular importance is the ancient practice of revoking wills, which I consider to be the legal frame of reference for the recipients of the Pauline letters to grasp expressions like καινὴ/παλαιὰ διαθήκη. In the Corinthian correspondence the conformity to the current legal practice is evident, but in Galatians Paul turns the whole procedure upside down, manipulating in the construction of his argument not only the practice of testamentary cancellation, but also the traditional connection of Abraham with circumcision. We are compelled to a text-internal solution of the problem in Gal 3.15–17 by the fact that the papyrological evidence shows clearly that no other type of document than the ordinary revocable διαθήκαι can be taken into consideration. This approach is not compilatory, as it is often the case when dealing with documentary papyri applied to New Testament texts, but heuristic, with the purpose of elaborating new exegetical insights in old controversies.
