 2.1023–1174. The final part of the book returns, symmetrically with the end of book 1, to the nature of the universe beyond the confines of our own world. This time Lucretius’ theme is the existence of other worlds besides our own, it being inconceivable, he argues, that in an infinite universe it should be only here that a world has formed. Moreover, he adds, worlds come and go, our own included. Both themes—the numberless plurality of worlds and their transience—Lucretius regards as helpfully damaging to the religious view of our world as a product of divine creation.