Jealousy can do horrible things to people, and It could even cause their death as Marleen states, “Love sees sharply, hatred sees even more sharp, but Jealousy sees the sharpest for it is love and hate at the same time” In Othello by William Shakespeare, Othello caused Desdamona’s death because she never thought of running away when Othello was getting jealous and wanted to kill her. Desdemona's love made her ignore Othello's jealousy. The theme of jealousy is demonstrated in the play by Iago and Othello.
The first Theme of jealousy is demonstrated by Iago. “O, Beware, my lord, of jealousy! / It is the green-eyed monster which doth mock / the meat it feeds on. (3.3.170-172). Iago pretends to warn Othello not to be a jealous man, pointing out that jealousy ends up destroying the heart of the man who falls prey to it. “The Moor already changes with my poison. / Dangerous conceits are in their natures poisons. / Which at the first are scarce found to distaste, / But with a little act upon the blood / Burn like the mines of sulfur....” (3.3.335-343). Iago realizes the strong power of jealousy, he claims that he has poisoned Othello’s mind by saying Desdemona may be up to something bad. “One Michael Cassio, a Florentine / (A fellow almost damned in a fair wife) / That never set a squadron in the field, / Nor the division of a battle knows / More than a spinster—unless the bookish theoric...”(1.1.21-34). Iago is saying that he hates Othello because Othello did not give him a promotion, instead he gave Cassio the position. Iago claims he’s much better then Cassio. Iago seems petty jealous. Jealousy is a horrible thing, causing doubt in people and the people they pass it on too.