From the very beginning of the play, Lady Macbeth is viewed as very controlling, strong, and certain; saying that Macbeth "Shalt be what thou art promised". This shows Lady Macbeth's command, she is ordering Macbeth to become what the witches have foreseen, not questioning whether he will achieve it, or even not try. From the very start therefore we see just how powerful Lady Macbeth is, if she can command her husband to murder the king of Scotland. Her power is also shown in the way she taunts Macbeth, saying he is "too full of the milk of human kindness"....
play was "full of sound and fury". However, we must ask whether it is this futility in life discovered by Macbeth, or the fact that their relationship has been deteriorating that Macbeth almost shrugs off his wife's death? Perhaps it is her cold hearted ways which have taught him not to care. But in any case, here we see how their relationship has deteriorated to such a state that Macbeth no longer cares if she is alive or not, where as before he had trouble with Duncan's death, someone far less close to him than his own wife.