See thyself, devil!
Proper deformity shows not in the fiend
So horrid as in woman.

– William Shakespeare

King Lear, Act 4, Scene 2. The highly moral Albany is appalled at how evil his wife Goneril is and tells her to see herself as she really is – a devil! He is seeing the reality of how horrible she is. While we expect the devil to look morally deformed, he says that it is particularly horrifying when a woman appears that way.