George Campbell FRSE was a Scottish Enlightenment philosopher, minister, and professor of divinity. Campbell was primarily interested in rhetoric, since he believed that its study would enable his students to become better preachers. He became a philosopher of rhetoric because he took it that the philosophical changes of the Age of Enlightenment would have implications for rhetoric.

"Of Miracles" is the tenth section of David Hume's An Enquiry Concerning Human Understanding (1748). In this piece, Hume states that evidence of miracles is never sufficient for rational belief.