Iago says at the beginning of Othello ."..I am not what I am." (Ii66). In Act III we see the widening gap between who he really is, and who he pretends to be. The audience, a witness to all that happens on stage, knows the truth, but the characters in the play are fooled by Iago.

In Scene III, Iago really begins to poison Othello's mind. All of his plans are finally beginning to be put into action. "Iago anticipates and manipulates the other characters so skilfully that they seem to be acting simultaneously of their own free will and as Iago's puppets" (http://www.sparknotes.com/). When Cassio hurries away after talking to Desdemona, Iago see this as the perfect opportunity to begin to pit Othello against his wife. Iago begins by saying "Ha! I like not that" (IIIiii35). Othello immediately becomes suspicious and questions Iago as...