Hume's theory of the credibility miracles

[A] religious enthusiast demands very much less proof for the alleged miracles of his own religion than for those of any other religion or for quite ordinary stories about everyday affairs. (I myself have a Scottish friend who believes all the miracles of the New Testament, but cannot be induced to believe, on the repeated evidence of my own eyes, that a small section of the main North British Railway between Dundee and Aberdeen consists of a single line.)