My lord. How have a done thee wrong?

My dear Othello. That wretched night when I tried to have thee understand poor Michael Cassio's reasoning, I meant no harm. He had done such great service to you and I both. He deserved my help. He deserved our help, my lord. "Excellent wretch! Perdition catch my soul but I do love thee; and when I love thee not, Chaos is come again." I am not this monster you thought me to be that night. I know not how I have done thee wrong. Why my lord did you stop loving me? What made thee jealous? I was never foul towards you. I never lay with any other but my lord. I was always your pure dove my lord, never the moist hand wretch you thought me to be. You were and forever will be thy only love for me.

Othello to Desdemona
Act 3 iii. 90-92
Literary Devices:
False Analogy: Othello talks about the familiar feeling when you do not love someone any more and compares it to the not so familiar chaos which will occur from no more love, but there are still a lot of differences between the two. By comparing the two we as the readers can understand what turns the switch for Othello from order to chaos.
Cause-and-effect Analysis: Othello is saying when he no longer loves Desdemona the consequence will be chaos. It is foreshadowing and allowing the reader to know he wont love Desdemona and chaos will occur. It also allows the reader to understand later on why the tragedy comes to a tragic end from the chaos.