Patriotic ignorance is maintained by the satisfaction that we feel in ignoring what is favorable to another nation. It is a voluntary closing of the mind against the disagreeable truth that another nation may be on certain points equal to our own, or even, though inferior, in some degree comparable to our own. The effect of patriotic ignorance as concerning human intercourse is to place any one who knows the exact truth in the unpleasant dilemma of having either to correct mistakes which are strongly preferred to truth, or else to give assent to them against his sense of justice. International intercourse is made almost impossible by patriotic ignorance, except amongst a few highly cultivated persons who are superior to it. Nothing is more difficult than to speak about one's own country with foreigners who are perpetually putting forward the errors which they have imbibed all their lives, and to which they cling with such tenacity that it seems as if those errors were, in some mysterious way, essential to their mental comfort and well-being. If, on the other hand, we have any really intimate knowledge of a foreign country, gained by long residence in it and studious observation of the inhabitants, then we find a corresponding difficulty in talking reasonably about it and them with our own countrymen, because they, too, have their patriotic ignorance which they prize and value as foreigners value theirs. At the risk of turning this Essay into a string of anecdotes, I intend to give a few examples of patriotic ignorance, in order to show to what an astonishing degree of perfection it may attain. When we fully understand this we shall also understand how those who possess such a treasure should be anxious for its preservation. Their anxiety is the more reasonable that in these days there is a difficulty in keeping things when they are easily injured by light. A French lady who possessed this treasure in its perfection gave, in my hearing, as a reason why French people seldom visited England, that there were no works of art there, no collections, no architecture, nothing to gratify the artistic sense or the intelligence; and that it was only people specially interested in trade and manufactures who went to England, as the country had nothing to show but factories and industrial products. On hearing this statement, there suddenly passed before my mind's eye a rapid vision of the great works of architecture, sculpture, and painting that I had seen in England, and a confused recollection of many minor examples of these arts not quite unworthy of a studious man's attention. It is impossible to contradict a lady; and any statement of the simple truth would, in this instance, have been a direct and crushing contradiction. I ventured on a faint remonstrance, but without effect; and my fair enemy triumphed. There were no works of art in England. Thus she settled the question.