"How then can we represent, by a sensible image, the mind as a theatre to its own actings? Let us conceive a spacious saloon, in which our thoughts and passions exert themselves, and let its walls be encrusted with mirrour, for the purpose of reflection, in the same manner that rooms in voluptuous oriental countries are said to be finished for the purposes of increasing sensual delight."
— Boswell, James (1740-1795)
(I, pp. 151-3 in SUP edition)
See also James Boswell, The Hypochondriack, ed. Margery Bailey, 2 vols. (Stanford UP, 1928)