I swear to God you're accusing me wrongly! IV.ii.86
Even the wind that blows over everything on earth is ashamed to visit you. You brazen whore! IV.ii.83-85
Did you see how he laughed about sleeping with her? And did you see the handkerchief? IV.i.162, 164
Oh Iago! Yes,let her die and rot and go to hell tonight. She wont stay alive for long! IV.i.163, 172
Why would I ever get married? ... Maybe because I'm black, and I don't have nice manners like courtiers do, or because I'm getting old. III.iii.247-248...267-270
Thanks to Iago's manipulations, Othello was convinced that Desdemona is cheating on him with Cassio. Evidence that Iago provided him with led Othello to go lash out on Desdemona personally. Obviously, Desdemona was confused whilst being framed by Iago so she doesn't understand why Othello was treating her rudely. Since Othello found out his handkerchief which symbolized Desdemona's love ended up in Cassio's possession due to Iago's plan, Othello decides to request Desdemona her handkerchief at that moment. Othello knew she didn't have it and when she stated that she didn't have it at the moment, he knew she was unfaithful. This is an important person vs person conflict because Othello decides to confront Desdemona about her actions, creating a climax of that scene. The climax has two of the main characters opposing each other, resulting in a new tense mood and a crumbling relationship status between the married couple. This propels the drama by providing new character perspectives , involving Desdemona's and Othello's once true, unbreakable love into Othello wanting to kill Desdemona for being a whore.
Iago starts to conduct the following steps of his plan, where he would tell Othello that his wife, Desdemona is definitely cheating. Instead of just hinting at the fact that she is cheating, Iago makes Othello hide while he talks with Cassio. However, Iago actually talks about Bianca with Cassio, making Cassio seem guilty since he laughs and smiles whenever Bianca's name is brought up. To Othello, it seemed like he is denying Iago's question about sleeping with Desdemona by laughing and smiling. He could not hear the conversation but only see it, leaving him only one option but to trust Iago to tell him the " truth " about what Cassio said about Desdemona. When Cassio leaves and Iago comes to Othello to discuss the conversation he was just watching, Iago manipulates Othello into thinking he was actually talking about Desdemona. This person vs. person conflict had Othello be gullible enough to believe Iago without hearing the conversation himself. The importance of this conflict is how Iago manages to carry out his plan by manipulating anyone he wants, especially to break up an important bond and marriage. After Othello hears what Iago has to say, it will change his perspective on Desdemona from that point on, already mentioning how he plans to kill her for revenge. This propels the drama by making Othello act differently to Desdemona from that point on, creating arguments between the couple and maybe even leading to separation.
After realizing how horrible Othello's marriage became, Othello had a person vs. self conflict. Othello started to think deeply about what Iago has told him about Desdemona and how he proved her affair. Instead of taking the thought of Iago lying about the the situation into consideration, he instantly blames himself for her cheating on him in marriage. Othello doubting himself is an important self conflict in the drama as it shows his self confidence of being a moor and different from his white society being very low. He starts to think that his skin color associates with Desdemona's actions along with many more doubting thoughts such as his age and manners. Only after Iago has fed Othello with lies about Desdemona, had Othello make him think of himself that way. Othello's self conflict propels the drama by allowing himself be closer friends with his enemy, as Othello thinks Iago knows more about his human behavior than he does himself. Othello makes himself vulnerable to more of Iago's future manipulations allowing more lies to be told to Othello himself in the future.