The secret of pleasing in conversation is not to explain too much everything; to say them half and leave a little for divination is a mark of the good opinion we have of others, and nothing flatters their self-love more.
Francois de La RochefoucauldIt is no tragedy to do ungrateful people favors, but it is unbearable to be indebted to a scoundrel.
Francois de La Rochefoucauld