Surah 55. Ar-Rahman, Ayah 34

Note how gradually we have been led up in the Argument. 'The Signs of Allah are all about you, in revelation, in your intelligence, and in nature around you. Your creation; the light and heat typified by the sun in all directions; the cycle of waters in the physical earth and of Knowledge in the world of Intelligence; the help and cherishing care of Allah Himself;-all these things should teach you the Truth and warn you about the Future, which is more particularly referred to in the remainder of the Sura.