"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."
"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 path of genius is free, and its own"
"There are no rules for friendship. It must be left to itself. We cannot force it any more than love."
"The dupe of friendship, and the fool of love; have I not reason to hate and to despise myself? Indeed I do; and chiefly for not having hated and despised the world enough."
"Cunning is the art of concealing our own defects, and discovering other people's weaknesses."