What happens
Orsino summons Cesario to hear an old song that comforted him. While music plays, the Duke philosophizes about love's nature—how it feeds endlessly like the sea, consuming everything that enters it. He then turns to Cesario, asking about his own capacity for love, and Cesario hints at a woman of Orsino's appearance whom he loves. Orsino dismisses this as impossible, declaring his own love for Olivia incomparable, and sends Cesario back to woo her.
Why it matters
This scene reveals Orsino's fundamental misunderstanding of love itself. His opening speech—'If music be the food of love, play on'—establishes love as an appetite that grows by feeding, not by satisfaction. He frames his desire as voracious and oceanic, capable of consuming 'as much' as the sea itself. Yet his actual pursuit of Olivia is passive: he sends a proxy rather than facing her himself. This contradiction between his grandiose self-description and his cautious behavior suggests Orsino is in love with the *idea* of love, the performance of passion, rather than with Olivia as a person. When Cesario speaks of loving someone of Orsino's complexion, the Duke immediately insists such a thing is impossible—that no woman's love could match his own. He cannot conceive that someone might actually feel what he merely performs.
Cesario's responses expose the danger of Orsino's blindness. When asked about his hypothetical love, Viola speaks truth through metaphor: she describes a sister who 'pined in thought' and wasted away from unrequited love, her feelings hidden like 'a worm i' the bud.' This is, of course, Viola's own situation—she loves Orsino but cannot declare it. Yet Orsino hears the story and remains unmoved, concerned only with whether this imaginary sister died. He asks no follow-up questions about her suffering, showing that he cannot engage with genuine emotion because he is too absorbed in his own performance. The scene ends with Orsino sending Cesario back to Olivia with renewed urgency, unaware that he is sending the person who loves him most to convince another woman to reject him.