His vain ego has been hurt. Othello has chosen a "bookish theoric" to be his lieutenant instead of him. Iago clearly shows his vengefulness when manipulates Roderigo to plant the seeds of dissent between Othello and Brabantio, believing it will ultimately get him his revenge. The idea of ruining Othello is beginning to consume Iago. Iago is exposed as a psychopath in a second scene of Othello. Where Iago lies to himself to the point where he believes his own lies to support his hate. Iago's jealousy of the Moor is so strong that he developes lies of Othello committing adultery with his wife Emilia. Iago is jealous of Othello's ability to woo the young and alluring Desdemona. That he manipulates Othello's to believe that his new bride is
