This notable lack of ordinary good manners made Sunderland countless enemies: Bishop Burnet wrote that "he had too much heat, both of imagination and of passion, was apt to speak freely both of persons and things, and raised himself many enemies from a contemptuous treatment of those who differed from him". His remarkable ability to adapt to the wishes of three different monarchs was considered a fault rather than a virtue: as Burnet observed "he came by this to lose so much that even those who esteemed his parts depended little on his probity".