While all the prophets have their signs, Moses had the competition with the magicians and the Pharaoh, Jesus healed the sick and raised the dead and so on, one sign was given to the last of the prophets. According to the Muslims, this is the Qur'an. And this one Sign is still with us. Does not that after all seem fair, that if prophethood is to end that the last prophet should bring something that stays with us so that, in fact, a Muslim who takes his religion seriously suffers no disadvantage to Muslims who lived fourteen centuries ago?

Those people who kept company with the Prophet had access to no more of the necessary information than we have today. They had the Qur'an. That was the sign for them. It is still a sign to us today, the same miracle.

Well, let us test the Qur'an. Suppose that if I say to a man, "I know your father." Probably he is going to examine the situation and see if it seems likely that I have met his father. If he is not convinced he will start asking me questions like: "You know my father, you say, is he a tall man? Does he have curly hair? Does he wear glasses?" and so on. If I keep giving him the right answers to all these questions, pretty soon he is going to be convinced. "Well I guess this man did meet my father like he said." You see the method.