Answer and explanation:
In Shakespeare's "Macbeth," the protagonist and his wife's hallucinations reflect the sense of guilt that is eating them inside and driving them mad. They feel such remorse over murdering everyone who stands in the way of becoming king and queen, that although they try to hide it, their minds cannot cope with it anymore. As a result, even though they exhibit their kind sides in public at first and pretend to be nice, their culpability cannot remain unseen at last. As a consequence, their darkness begins makes them have visions and reveal signs of mental concern.