And yet I fear you; for you are fatal then
When your eyes roll so: why I should fear I know not,
Since guiltiness I know not; but yet I feel I fear.
– William Shakespeare
Othello, Act 5, Scene 2. Desdemona knows that she is innocent and has done nothing wrong that she needs to confess to. But she sees the extent of her troubled husband’s mental deterioration in the rolling eyes and talk of killing. For the first time she is afraid of him.