It had to do with the knowledge that the world was as it was because of what men believed it was... year by year, these past three or four generations, the minds of men had been hardened to believing that there was one God, one world, one way of describing reality, and that all things which intruded on the realm of that great one-ness must be evil and of the fiends, and that the sound of the bells and the shadow of their holy places would keep the evil afar. And as more and more people believed this, it was so, and Avalon no more than a dream adrift in an almost inaccessible other world