“‘Before we enter into a discussion on this question, tell me what you think of a boat in the Euphrates which goes to shore, loads itself with food and other things, then returns, anchors and unloads all by itself without anyone sailing or controlling it?’ They said, ‘That is impossible; it could never happen.’ Thereupon he said to them, ‘If it is impossible with respect to a ship, how is it possible for this whole world, with all its vastness, to move by itself?'”