I offer, for your unlikely but possible interest, a passage from Michael Bonner, Jihad in Islamic History: Doctrines and Practice (Princeton and Oxford: Princeton University Press, 2006): How were people expected to know that these words of Revelation were indeed of divine origin? One answer to the question was that the Prophet Muhammad, through whom the words came into the world, was a trustworthy man whose life and behavior conformed to established patterns of monotheist prophecy. The... Read more