“In the creation of the heavens and the earth the alternation of the night and the day, in the ships that sail in the sea with their load…. in the rain which Allah sends down from the sky and thus revives the earth after its death; and then He spread in all kinds of animals; in the changing of the winds: in the clouds which have been left suspending between the heaven and the earth -in all these are clear signs for the people who understand”