With Shakespeare also king and father come together. A remark of Lady Macbeth shows that when she addresses herself to the murder of Duncan. "Had he not resembled my father as he slept, I had done't." This physical likeness signifies identity of individuals, as we know from many analogous examples. The king therefore resembles the father because he stands for her parent. Still one more point may be well explained from her father complex. The Chronicle speaks of the overweening ambition of Lady Macbeth. Now we know from neuropsychology that burning ambition in later years represents a reaction formation to infantile bed wetting. It is the rule with such children that they are placed upon the chamber at night by father or mother. Thus we comprehend from another side, with the so frequent identification with beloved persons, precisely why the lady wanders at night with a candle in her hand. Here again appears plainly the return to the infantile erotic. Now for the grounds of her collapse. As long as Lady Macbeth is fighting only for the childish goal, she is an unshakeable rock amid the storms of danger. She shrinks from no wrong and no crime that she may be queen at her husband's side. But she must gradually perceive that her husband will never win satisfaction, he will never recover from the king-father murder, her hopes will never be fulfilled and she will never live in quiet satisfaction at the side of her father. Then her power of endurance gives way until her very soul fails utterly. As she says on the occasion of the first disappointment after Duncan's death: "Nought's had, all's spent, Where our desire is got without content; 'Tis safer to be that which we destroy, Than, by destruction, dwell in doubtful joy." Now the unconscious, hitherto successfully repressed, avenges itself, now conscience awakes and as the husband leaves her completely alone she begins to wander, that is to seek to return to the infantile ideal. In her wandering she herself plays the rôle of father, who once approached her with the lighted candle and then called to her, "Come, come, come, come, give me your hand!" and bade her go to bed.