"L.C. Knights in the essay Macbeth describes the unnaturalness of Lady Macbeth's words and actions: Thus the sense of the unnaturalness of evil is evoked not only be repeated explicit references (nature's mischief, nature seems dead, 'Tis unnatural, even like the deed he is done, and so on) but by the expression of unnatural sentiments and an unnatural violence of tone in such things as L" . . . <123helpme.com> .