Duke uses very colourful language, for example, “let music be the food of love, play on”. This simile, enhanced by Feste playing music to “surfeit…” his appetite, emphasises the music theme of the play. It also shows a ‘soft’ side to Orsino, which he tries to hide by saying, “Notable pirate! Thou salt-water thief” to Antonio. The word “notable” is suggestive that Antonio also has a reputation and the Duke tries to compete with him. He also threatens Cesario when he says, “I’ll sacrifice the lamb that I do love, To spite a raven’s heart with a dove,” which shows his arrogance and need to uphold his reputation due to his public display of his obsessive with Olivia. He tells Cesario that he never wants to see him again: “direct thy feet where thou and I henceforth may never meet” without even letting him explain which suggests that he is just angry and spiteful towards Olivia and so takes his anger, ungracefully, out on his ‘friend’.
He eventually loses his arrogance and becomes self-pitying after Olivia’s rejection as he states that love is too hard and would rather die by saying “music be the food of love” to suggest that he hopes that if he “[gets] excess of it… the appetite may sicken, and so die”.
Orsino is perceived as generous and tolerant as he gives Feste lots of money for some meek entertaining and isn’t irritated by his cheekiness. We see this when he talks to Feste in Act 5: “Thou