act3 scene3

"His bed shall seem a school, his board a shrift," Desdemona says of Othello; these paradoxes highlight Desdemona's determination to set things right. Ironically, it is this determination to "intermingle everything [Othello] does with Cassio's suit" that precipitates her death (III.iii.24-26). Had Desdemona not felt such a sense of justice or been good enough to advocate for a case in which she was not involved, she might have survived. Desdemona is undone by her own goodness, and her need to step into affairs on a public level, which upsets Othello.