of things; and the absolute conviction that, beyond the totality of things, reality forms a beautiful and harmonious whole. In the Theogony, the origin (arche) is Chaos, a divine primordial condition, and there are the roots and the ends of the earth, sky, sea, and Tartarus. Pherecydes of Syros (6th century BC), believed that there were three pre-existent divine principles and called the water also Chaos. In the language of the archaic period (8th – 6th century BC), arche (or archai) designates the source, origin, or root of things that exist. If a thing is to be well established or founded, its arche or static point must be secure, and the most secure foundations are those provided by the gods: the indestructible, immutable, and eternal ordering of things. In ancient Greek philosophy, arche is the element or first principle of all things, a permanent nature or substance which is conserved in the generation of the rest of it. From this, all things come to be, and into it they are resolved in a final state. It is the divine horizon of substance that encompasses and rules all things. Thales (7th – 6th century BC), the first Greek philosopher, claimed that the first principle of all things is water. Anaximander (6th century BC) was the first philosopher who used the term arche for that which writers from Aristotle on call the "substratum". Anaximander claimed that the beginning or first principle is an endless mass (Apeiron) subject to neither age nor decay, from which all things are being born and then they are destroyed there. A fragment from Xenophanes (6th century BC) shows the transition from Chaos to Apeiron: "The upper limit of earth borders on air. The lower limit of earth reaches down to the unlimited (i.e the Apeiron)." Other cosmogonies in ancient literature In the Theogony the initial state of the universe, or the origin (arche) is Chaos, a gaping void (abyss) considered as a divine primordial condition, from which appeared everything that exists. Then came Gaia (Earth), Tartarus (the cave-like space under the earth; the later-born Erebus is the darkness in this space), and Eros (representing sexual desire - the urge to reproduce - instead of the emotion of love as is the common misconception). Hesiod made an abstraction because his original chaos is something completely indefinite. By contrast, in the Orphic cosmogony the unaging Chronos produced Aether and