sermons he left behind would indicate that his pulpit ministry was, in fact, of a very fine quality. We cannot be completely sure because his sermons have not been preserved as sermons but as commentaries. It would appear that many of his commentaries were originally series of sermons which were edited as commentaries. This is particularly transparent in his commentary on the Gospel of Luke, where the homiletical forms are still quite noticeable. It is for this reason that we will base our study