If the teacher happens to be a man of sense, it must be an unpleasant thing to him to be conscious, while he is lecturing to his students, that he is either speaking or reading nonsense, or what is very little better than nonsense.
 Adam Smith, The Wealth of Nations (1776). copy citation

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Author Adam Smith
Source The Wealth of Nations
Topic nonsense reading
Date 1776
Language English
Reference An Inquiry into the Nature and Causes of the Wealth of Nations
Note
Weblink http://www.gutenberg.org/files/3300/3300-h/3300-h.htm

Context

“such a regulation would not only tend very much to extinguish all emulation among the different tutors of the same college, but to diminish very much, in all of them, the necessity of diligence and of attention to their respective pupils. Such teachers, though very well paid by their students, might be as much disposed to neglect them, as those who are not paid by them at all or who have no other recompense but their salary. If the teacher happens to be a man of sense, it must be an unpleasant thing to him to be conscious, while he is lecturing to his students, that he is either speaking or reading nonsense, or what is very little better than nonsense. It must, too, be unpleasant to him to observe, that the greater part of his students desert his lectures; or perhaps, attend upon them with plain enough marks of neglect, contempt, and derision. If he is obliged, therefore, to give a certain number of lectures, these motives alone, without any other interest, might dispose him to take some pains to give tolerably good ones.” source