In "Othello", jealousy is what appears to destroy him. Othello takes the word of an alleged trusted man, that his new bride has deceived him. Betrayal and manipulation lie at the heart of Othello and the jealousy destroys them all.
This powerful destructive emotion was first suggested by Othello's trusted friend "Iago the Honest" when he says, "O beware jealousy; / It is the green ey'd monster, which doth mock / That meat it feeds on" (III.3, 169-170). It was Iago's own jealousy that put the wheels in motion for Othello's demise. …
