a kafir asked imam ghazali that this verse has: kullun fee falak, and said that your qur'an only talks about one-way orbit. we know that orbits happen in both directions: forward and back. imam ghazali replied: read the words kullun fee falak backwards. they read the same as they do when read normally. so, the qur'an does have it that orbits happen in both directions. ك ل ف ى ف ل ك --- has someone got a reference for this story and is it valid?