"Bring him into society, and he is immediately provided with the mirror which he wanted before. It is placed in the countenance and behaviour of those he lives with, which always mark when they enter into, and when they disapprove of his sentiments; and it is here that he first views the propriety and impropriety of his own passions, the beauty and deformity of his own mind."
— Smith, Adam (1723-1790)
(pp. 254-6; cf. 110-1 in Liberty Fund ed.)
See The Theory of Moral Sentiments: By Adam Smith (London: Printed for A. Millar; and A. Kincaid and J. Bell, in Edinburgh, 1759). <Link to ESTC><Link to ECCO-TCP>
Reading Adam Smith, The Theory of Moral Sentiments, ed. D.D. Raphael and A.L. Macfie (Indianapolis: Liberty Fund, 1984).