From “Imagination and Thought in the Middle Ages” by C.S. Lewis, first delivered as a lecture in 1956, the piece was published posthumously in the 1966 collection of essays called Studies in Medieval and Renaissance Literature:
Go out on any starry night and walk alone for half an hour, resolutely assuming that pre-Copernican astronomy is true. Look up at the sky with that assumption in mind. The real difference between living in that universe and living in ours will, I predict, begin to dawn on you.
…You will be looking at a world unimaginably large but quite definitely finite. At no speed possible to man, in no lifetime possible to man, could you ever reach its frontier, but the frontier is there; hard, clear, sudden as a national frontier.
…We find (not now by analogy but in strictest fact) that in every sphere there is a rational creature called an Intelligence which is compelled to move, and therefore to keep his sphere moving, by his incessant desire for God.
…The motions of the universe are to be conceived not as those of a machine or even an army, but rather as a dance, a festival, a symphony, a ritual, a carnival, or all these in one. They are the unimpeded movement of the most perfect impulse towards the most perfect object.