This is but a vehement, passionate, and exaggerated way of saying that if she had sworn to herself to do _anything_, however shocking, as deliberately and determinedly as Macbeth had to commit this murder, she would do it in spite of consequences, and not like him be “afeard to be the same in thine own act and valor as thou art in desire.” She does not mean, nor did Shakespeare mean, that so hideous an act would be possible for her either to plan or to commit; but to prove her contempt of that condition of mind when “I dare not” waits upon “I would,” she seizes on the most horrible and repulsive act that she can imagine, and declares energetically that, shocking as that is, she would not hesitate to do even that, had she so sworn to do it as Macbeth had. Yet this wild and violent figure of speech is generally taken as the key of her whole character. It is nothing of the sort; for the very line preceding it proves that she had a tenderness of nature under all her energy, and a power of love as well as of will:— “I have given suck, and know How tender ’tis to love the babe that milks me.” Well, despite that tenderness and love, which you, Macbeth, know I have, I would have done what is so contrary to all my nature, had I so sworn as you. Throughout this scene her sole object is to urge upon Macbeth, as vehemently as she can, the folly of dallying and hesitating to carry out a project which he alone had conceived, suggested, and determined, merely for fear of consequences and lest it should do him injury in the eyes of the world. He never feels nor suggests any moral objection; he does not pretend to feel it. His sole fear is lest he may not succeed; he only doubts whether it would not be better to postpone the execution of his project until a more fitting time. His decisions are less rapid than hers. She must at once act on the first strength of her resolve. She is impetuous, and would spring upon her prey at once. He, knowing that his fell purpose will only strengthen with meditation, and doubting whether the time has come to secure his object, proposes to postpone its execution. But there is no time for this. There are but a few hours in which all must be accomplished, and he is not ready with the detail. But to this proposal of postponement she says “No.” She knows that he never will rest till it is accomplished. Neither time nor place adhered when you “broke this enterprise to me,” she says; and now, when both “have made themselves,” execute your design, and no longer let “I dare not wait upon I would.” To this he feebly opposes, “If we should fail,” failure being the only thing that troubles him. She then suggests the plan in detail by which the murder can be effected; and he cries out, in a burst of admiration and delight,— “Bring forth men-children only, For thy undaunted mettle should compose Nothing but males.”