 The two main kinds of non-literal discourse that have been seen as particularly important in religion are analogy and  metaphor.[4]  Analogy relates to the use of expressions that occur in both religious and non-religious contexts. Take, for example, the expressions “good”, “wise” and “powerful” when used in ordinary contexts to talk about people. Do these expressions have the same meaning when used to talk about God, or are they used analogously: is the conventional meaning they have when used to talk about mundane objects in some way modified when used to talk about God? Discussion of religious analogy was particularly lively in early medieval theology and Aquinas was a leading proponent of an analogical treatment of religious predicates. See Roger M. White (2010) for a detailed account of Aquinas’ theory, its background in Aristotle’s philosophy as well as subsequent ideas about analogy in religion in the work of Karl Barth and Immanuel Kant.