François VI, Duc de La Rochefoucauld, Prince de Marcillac (French pronunciation: ​[fʁɑ̃swa də la ʁɔʃfucol]; 15 September 1613 – 17 March 1680) was a noted French author of maxims and memoirs. His is a clear-eyed, worldly view of human conduct that indulges in neither condemnation nor sentimentality. Born in Paris on the Rue des Petits Champs, at a time when the royal court was oscillating between aiding the nobility and threatening it, he was considered an exemplar of the accomplished 17th-century nobleman. Until 1650, he bore the title of Prince de Marcillac. - Wikipedia