He creates a mask from reality by lying and deceiving almost everyone he comes into contact with. At the same time he makes it seem like they're getting a better end of the deal, using the positive side of what he says to make them want to complete the task. In turn, they encounter an outcome they least expected because of the way Iago makes the situation worse. He is very clever with words, regardless of the gullibility or intellect of the person or people he speaks to. What do you make of all this chaos? How does he justify his reasoning that he tortures these people in their heads? These questions give interesting answers since they can be answered differently