For now, having the ears of men, Sauron with many arguments gainsaid all that the Valar had taught; and he bade men think that in the world, in the east and even in the west, there lay yet many seas and many lands for their winning, wherein was wealth uncounted. And still, if they should at the last come to the end of those lands and seas, beyond all lay the Ancient Darkness. 'And out of it the world was made. For Darkness alone is worshipful, and the Lord thereof may yet make other worlds to be gifts to those that serve him, so that the increase of their power shall find no end.'
Akallabeth, The Silmarillion