"Few things tend more to alienate friendship than a want of punctuality in our engagements. I have known the breach of a promise to dine or sup to break up more than one intimacy."
"Even in the common affairs of life, in love, friendship, and marriage, how little security have we when we trust our happiness in the hands of others!"
"To be capable of steady friendship or lasting love, are the two greatest proofs, not only of goodness of heart, but of strength of mind."
"the old maxim... "there are three things necessary to success in life--Impudence! Impudence! Impudence!"
"Do not keep on with a mockery of friendship after the substance is gone - but part, while you can part friends. Bury the carcass of friendship: it is not worth embalming."
"Cunning is the art of concealing our own defects, and discovering other people's weaknesses."