 Grouchy agrees with Cabanis that the ultimate source of human development is physical, and this is how she departs from Smith’s account of sympathy. Smith acknowledges that sympathy exists as part of human psychology, but Grouchy insists on tracing its origins and finds them in sensations of pleasure and pain. While Cabanis is mostly interested in finding physiological correspondences for particular moral or psychological phenomena, Grouchy, starting from simply physiological sources, builds a complex and complete theory of moral development, which starts from particular and personal attachments and ends in the love of humanity in general.