Irony is featured all throughout this popular Shakespearean play. One memorable part is when Iago, who is envious towards Cassio, stated in the play, “O, beware, my lord, of jealousy! It is the green-ey’d monster which doth mock The meat it feeds on.” (Shakespeare , Act 3, Scene 3) Iago states this to Othello ironically , because he is the one planting the soul of the green eyed monster within Othello, and also this whole tragedy began with Iago’s envy towards Cassio getting promoted to Othello’s