 The idea of a “religion of reason” as an alternative to established religions for the sake of overcoming the quarrels between them was typical for the Enlightenment, and is found in thinkers such as Voltaire, Diderot and Kant. In his parable of the rings (which goes back to medieval precursors) in the play Nathan the Wise (1779), G. E. Lessing offers a powerful image for the peaceful competition of established religions that both underlines their common ancestry as well as their differences due to multiple historical traditions of faith. Since there is no objective proof as to their truth for the time being, they are called upon to deliver such proof by acting morally and harmoniously until the end of time.