Never ask any one who is conversing with you to repeat his words. Nothing is ruder than to say, "Pardon me, will you repeat that sentence? I did not hear you at first," and thus imply that your attention was wandering when he first spoke.
When we speak of ourselves and another person, whether he is absent or present, propriety requires us to mention ourselves last. Thus we should say, he and I, you and I.
If a man is telling that which is as old as the hills, or which you believe to be false, the better way is to let him go on. Why should you refuse a man the pleasure of believing that he is telling you something which you never heard before? Besides, by refusing to believe him, or by telling him that his story is old, you not only mortify him, but the whole company is made uneasy, and, by sympathy, share his mortification.
Never notice it if others make mistakes in language. To notice by word or look such errors in those around you, is excessively ill-bred.
Avoid raillery and sarcasm in social parties. They are weapons which few can use; and because you happen to have a razor in your possession, that is no reason why you should be allowed to cut the throats of the rest who are unarmed. Malicious jests at the expense of those who are present or absent, show that he who uses them is devoid both of the instincts and habits of a gentleman. Where two individuals or the whole company agree to banter each other with good-natured sallies of wit, it is very pleasant, but the least taint of ill-nature spoils all.
If upon the entrance of a visitor you continue a conversation begun before, you should always explain the subject to the new-comer.
If there is any one in the company whom you do not know, be careful how you let off any epigrams or pleasant little sarcasms. You might be very witty upon halters to a man whose father had been hanged. The first requisite for successful conversation is to know your company well.
Carefully avoid subjects which may be construed into personalities, and keep a strict reserve upon family matters. Avoid, if you can, seeing the skeleton in your friend's closet, but if it is paraded for your special benefit, regard it as a sacred confidence, and never betray your knowledge to a third party.
Listen attentively and patiently to what is said. It is a great and difficult talent to be a good listener, but it is one which the well-bred man has to acquire, at whatever pains. Do not anticipate the point of a story which another person is reciting, or take it from his lips to finish it in your own language. To do this is a great breach of etiquette.
Dr. Johnson, whose reputation as a talker was hardly less than that which he acquired as a writer, prided himself on the appositeness of his quotations, the choice of his words, and the correctness of his expressions. Had he lived in this "age of progress," he would have discovered that his lexicon was not only incomplete, but required numerous emendations. We can fancy the irritable moralist endeavoring to comprehend the idea which a young lady wishes to convey when she expresses the opinion that a bonnet is "awful," or that of a young gentleman, when he asserts that his coat is "played out!"