The book Lewis wrote that makes this most clear is The Discarded Image
It lays out how the assumptions of our worldview differ from those that went before, particularly the world of the medieval Christians. It's a very, very good book.
My favorite's still The Great Divorce.
10 posted on 11/29/2004 10:08:43 AM PST by AnAmericanMother
(. . . Ministrix of ye Chace (recess appointment), TTGC Ladies' Auxiliary . . .)