You must labour to acquire that great and uncommon talent of hating with good breeding, and loving with prudence; to make no quarrel irreconcilable by silly and unnecessary indications of anger; and no friendship dangerous, in care it breaks, by a wanton, indiscreet, and unreserved confidence.
Lord ChesterfieldTalk often, but never long; in that case, if you do not please, at least you are sure not to tire your hearers. Pay your own reckoning, but do not treat the whole company; this being one of the few cases in which people do not care to be treated, every one being fully convinced that he has wherewithal to pay.
Lord Chesterfield