The light begins in The Silmarillion as a unity, and in accordance with the splintering of creation is divided into more and more fragments as the myth progresses. Middle-earth is peopled by the angelic Valar and lit by two great lamps; when these are destroyed by the fallen Vala Melkor, the world is fragmented, and the Valar retreat to Valinor, which is lit by The Two Trees. When these too are destroyed, their last fragment of light is made into the Silmarils, and a sapling too is rescued, leading to the White Tree of Numenor, the living symbol of the Kingdom of Gondor. Wars are fought over the Silmarils, and they are lost to the Earth, the Sea, and the Sky, the last of these, carried by Eärendil the Mariner, becoming the Morning Star. Some of the star's light is captured in Galadriel's Mirror, the magic fountain that allows her to see past, present, and future; and some of that light is, finally, trapped in the Phial of Galadriel, her parting gift to Frodo, the counterbalance to Sauron's evil and powerful Ring that he also carries. At each stage, the fragmentation increases and the power decreases. Thus the theme of light as Divine power, fragmented and refracted through the works of created beings, is central to the whole mythology.