O most wicked speed, to post / With such dexterity to incestuous sheets! / It is not, nor it cannot come to good. / But break, my heart, for I must hold my tongue.
Act I, Scene 2 · Hamlet
Context
Hamlet concludes his first soliloquy by condemning his mother's hasty remarriage and acknowledging that he cannot speak his thoughts aloud.
Analysis
The command to his heart—'break'—is immediately contradicted by 'I must hold my tongue,' trapping Hamlet between internal rupture and external silence. The line's structure enacts the bind: he can either break (inside) or stay silent (outside), but not both. The word 'incestuous' (marriage to a brother-in-law was considered incest) names what the court will not, showing the gap between what Hamlet knows and what he can say publicly.
Essay Tip
Support a thesis that Hamlet's inaction begins with enforced silence—his first soliloquy ends by naming the social constraint that prevents him from speaking, establishing a pattern where knowledge and speech are split.