Intelligent, mature and conscientious people should study scenes of earth and sky and they should think deeply with wisdom and intelligences about what they see in these scenes. Oh, Prophet Muhammad (PB.U.H.)! You tell people that they should observe whatever is present on earth and whatever is present in the skies. Yet is it not true that they do not observe, do not think deeply, and are not prudent? “In the eyes of God the worst creatures are those who are deaf and dumb. Which means that they are living a life as deaf and dumb ones and do not do anything prudently” (the Quran).