She says your'e going to marry her. Are you?IV.i.113
Me, marry her? That whore? Please give me a little credit! I'm not stupid. Ha, ha ha! IV.i.116-118
Ha, ha ha! IV.i.114
Never, Iago. My thoughts of revenge are flowing through me like a violent river, never turning back to love, only flowing toward full revenge that'll swallow them up. I swear to God I'll get revenge. III.iii.460-469
IV.i.90-138. In this scene, Iago manipulates Othello once again. He convinces him to hide, as he is about to talk with Cassio. He asks Cassio questions that relate to Bianca, however Iago tells Othello earlier that he will talk to Cassio about Desdemona. Cassio talks about Bianca, and Othello is furious as he believes Cassio is talking about Desdemona. This is an external conflict, and a person versus person conflict for Othello, as he is being manipulated by Iago who is the antagonist of the play. This propels the plot since this is all part of Iago's sinister plan. Making Othello upset at Cassio will cause him to be furious, and since Othello has power he can get Cassio in trouble.
III.iii.460-469. This is an internal conflict for the protagonist, Othello, and a person versus person conflict. Othello has thoughts of revenge and is miserable. He is furious at Desdemona as he thinks she is cheating on him. He compares his thoughts of jealousy to a violent river, showing how angry he is. This propels the plot since Iago wants Othello to build hatred for Cassio. By telling him that Desdemona and Cassio have an affair, Othello gets very jealous. Now he might never reinstate Cassio, and might get him in trouble.