Baur, to his dying day (e.g. in his Vorlesungen—Lectures—published posthumously, A.D. 1866), with reference to the resurrection of Christ, not only admitted, but strongly asserted, as things that have to be believed if history be worth anything—1. That the resurrection was, from the great Pentecost onward, believed in by all Christians as a vitally fundamental fact in the heart of their religion; and 2. That Paul, throughout his apostolic career, was fully persuaded of the historical reality of a glorious appearance of the risen Christ to him personally on his persecuting way to Damascus.

James MacGregor, The Apology of the Christian Religion (Edinburgh: T. & T. Clark, 1891), p. 14.