This book developed from sections of my doctoral dissertation, "The Possibility of Religious Knowledge: Causation, Coherentism and Foundationalism," Brown University, 1982. However, it actually had its beginnings much earlier when, as an undergraduate at the University of Virginia, I first read Hume's "Of Miracles" and became interested in it. (Fascinated would be too strong. ) My teacher put the following marginal comment in a paper I wrote about it: "Suppose someone told you that they had been impregnated by an angel whispering into their ear. Wouldn't you think they had gone dotty?" She...