937 If the unbelievers are merely obstinate, nothing will convince them. There is no story more full of miracles than the story of Jesus. Yet in that same story we are told that Jesus said: "A wicked adulterous generation seeketh after a sign; and there shall no sign be given unto it, but the sign of the Prophet Jonah": Matt.
16:4. There are Signs given by Allah everyday-understood by those who believe. A mere insistence upon some particular or special Sign means mere contumacy and misunderstanding of the spiritual world.