
After her husband told her in a letter about his opportunity to become king, Lady MacBeth tells herself that his temperament is "too full o' the milk of human kindness" for the necessary evil to kill the existing king and make this possible. In her eagerness, she calls for dark forces to "unsex" her and fill her with "direst cruelty". Her husband defers deciding on the matter, but when the king arrives, she ends his moral dilemma by manipulating him with clever arguments into committing the assassination. While he initially balks at the bloody tasks she insists that they are necessary to seize the throne; she wants him to leave everything to her and pull himself together, shocks him and questions his masculinity. Shortly after she makes her husband "do the deed", she admits, in an aside, that she could not have done it herself because the king has resembled her own father as he slept, implying that she too has at least some "milk of human kindness".







