Very few men can be satisfied with their own private consciousness that they have attained those qualities, or performed those actions, which they admire and think praise-worthy in other people
 Adam Smith, The Theory of Moral Sentiments (1759). copy citation

Context

“Some splenetic philosophers, in judging of human nature, have done as peevish individuals are apt to do in judging of the conduct of one another, and have imputed to the love of praise, or to what they call vanity, every action which ought to be ascribed to that of praise-worthiness. I shall hereafter have occasion to give an account of some of their systems,17 and shall not at present stop to examine them. Very few men can be satisfied with their own private consciousness that they have attained those qualities, or performed those actions, which they admire and think praise-worthy in other people; unless it is, at the same time, generally acknowledged that they possess the one, or have performed the other; or, in other words, unless they have actually obtained that praise which they think due both to the one and to the other.” source