Shakespeare constructs jealousy as an unstoppable psychological force, and he uses imagery, metaphor,
and dramatic irony to show how it corrodes Othello from within. The most famous device is Iago’s
metaphor of the “green-eyed monster”, which personifies jealousy as a living creature that feeds on its
host. Shakespeare deliberately externalises the emotion, suggesting that Othello becomes possessed rather
than merely influenced. The metaphor signals that jealousy functions as an autonomous agent in the
tragedy, consuming Othello’s rational identity and overwhelming his sense of judgement. This aligns with
the structural use of dramatic irony: the audience watches Othello fall victim to an emotional force the
audience recognises as false but that Othello experiences as absolute truth.
Throughout the play, Shakespeare uses poison imagery to depict the spread of jealousy. Iago repeatedly
speaks about “pouring” ideas into Othello’s ear, and the vocabulary of toxins (“pestilence”, “infected”,
“poisoned”) transforms words into lethal substances. Shakespeare’s diction suggests that jealousy is not
born inside Othello but implanted, slowly corrupting his moral bloodstream. The imagery creates a sense
of progressive contamination, mirroring Othello’s linguistic breakdown—from the measured verse of Acts
1–2 to the disjointed, violent prose of Acts 4–5. Jealousy literally alters his language, which is one of the
strongest indicators of psychological destruction in Shakespearean tragedy.
Dramatic irony intensifies jealousy’s tragic force. Because the audience knows Iago’s intentions from his
soliloquies, every scene in which Othello tries to seek truth becomes unbearable. Shakespeare weaponises
the gap between what the audience knows and what Othello believes. Devices such as interrupted syntax,
escalating rhetorical questions, and violent metaphors reveal Othello’s desperate attempt to hold onto
reason, even as jealousy unravels him. The handkerchief, used symbolically as the “ocular proof ” Othello
demands, completes the device-driven collapse: Shakespeare turns a simple object into a tool of visual
deception, showing the tragedy of a man who mistakes symbolic evidence for objective truth.
Jealousy as a Monster (Metaphor)
Shakespeare personifies jealousy as a creature that consumes the mind:
Iago: “O, beware, my lord, of jealousy! It is the green eyed monster which doth mock the meat it feeds
on.” (3.3)
This metaphor reveals jealousy as predatory, mocking, and capable of devouring its victims — a warning
Othello fails to heed, making the device tragically ironic.
Jealousy as Poison (Imagery)
Iago frames manipulation as toxic contamination:
“I’ll pour this pestilence into his ear.” (2.3)
The poison imagery shows that jealousy spreads internally and invisibly, reflecting how Othello’s thoughts
become “infected.”
False Evidence (Symbolism: Handkerchief)
Othello demands visual certainty:
“Give me the ocular proof.” (3.3)
When Iago stages Cassio with the handkerchief, the object becomes symbolic “proof ” that feeds Othello’s
jealousy and replaces reason with illusion.