"This order of passions, according to this system, was of a more generous and noble nature than the other. They were considered upon many occasions as the auxiliaries of reason, to check and restrain the inferior and brutal appetites. We are often angry at ourselves, it was observed, we often become the objects of our own resentment and indignation, when the love of pleasure prompts to do what we disapprove of; and the irascible part of our nature is in this manner called in to assist the rational against the concupiscible."
— Smith, Adam (1723-1790)
(text from http://www.econlib.org, VII.ii.11; confirmed in first edition; cf. p. 268 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).