Shakespeare uses the smoothness of Malvolio to convey this theme. He's the steward, and the man's good at his job. However, she has an exceptionally inflated a sense of self, and that he really wants to leave the service class behind. Maria knows it, and is particularly toying with him when she writes instructions in Olivia's hand that convinces Malvolio that Olivia loves her -- and desires to marry him, rescuing him from the life in service.
prise de muscle sec