duc de Louis de Rouvroy Saint-Simon, Memoirs of Louis XIV and His Court and of the Regency…
“ Dubois gained upon him as a child while his preceptor; he seized upon him as a young man by favouring his liking for liberty, sham fashionable manners and debauchery, and his disdain of all rule. He ruined his heart, his mind, and his habits, by instilling into him the principles of libertines, which this poor prince could no more deliver himself from than from those ideas of reason, truth, and conscience which he always took care to stifle. Dubois having insinuated himself into the favour of his master in this manner, was incessantly engaged in studying how to preserve his position. ”
