From "An Exact Exposition Of The Orthodox Faith" by John of Damascus.
The very harmony of creation, its preservation and governing, teach us that there is a God who has put all this together and keeps it together, ever maintaining it and providing for it. For how could such contrary natures as fire and water, earth and air, combine with one another to form one world and remain undissolved, unless there was some all-powerful force to bring them together and always keep them that way?
What is it that has ordered the things of heaven and those of earth, the things which move through the air and those which move in the water; nay, rather, the things which preceded them: heaven and earth and the natures of fire and water? What is it that combined and arranged them? What is it that set them in motion and put them on their unceasing and unhindered courses? Or is it that they had no architect to set a principle in them all by which the whole universe be moved and controlled? But who is the architect of these things? Or did not he who made them also bring them into being? We shall certainly not attribute such power to spontaneity. Even grant that they came into being spontaneously; then, whence came their arrangement? Let us grant this, also, if you wish. Then, what maintains and keeps the principles by which they subsisted in the first place? It is most certainly some other thing than mere chance. What else is this, if it is not God?