Religion is a topic which should never be introduced in society. It is
the one subject on which persons are most likely to differ, and least
able to preserve temper.

Never interrupt a person who is speaking. It has been aptly said that
"if you interrupt a speaker in the middle of his sentence, you act
almost as rudely as if, when walking with a companion, you were to
thrust yourself before him, and stop his progress."

To listen well, is almost as great an art as to talk well. It is not
enough _only_ to listen. You must endeavour to seem interested in the
conversation of others.

It is considered extremely ill-bred when two persons whisper in
society, or converse in a language with which all present are not
familiar. If you have private matters to discuss, you should appoint
a proper time and place to do so, without paying others the ill
compliment of excluding them from your conversation.

If a foreigner be one of the guests at a small party, and does not
understand English sufficiently to follow what is said, good-breeding
demands that conversation shall be carried on in his own language. If
at a dinner-party, the same rule applies to those at his end of the
table.

If upon the entrance of a visitor you carry on the thread of a
previous conversation, you should briefly recapitulate to him what has
been said before he arrived.