You think I am the reason Macbeth fell?
You sit there, centuries later, in your classrooms and library carrels, drawing neat lines in your notebooks: Witches → Prophecy → Ambition → Murder. Very elegant. Very simple. Maybe a bit too simple. Let me try to untangle this for you.
I am not the demon in Doctor Faustus, bargaining for a soul in exchange for twenty-four years of tricks and spectacle. I am not the Satan of Milton, arrayed in tattered grandeur, waging open war against the Highest Good. I am something quieter, and in a way, more unsettling: I am the disclosure of what is already there.
You call us "weird sisters." That is fair enough, though you rarely recall what wyrd once meant: not "strange," but "fate," "that which comes to pass." We are not the engineers of destiny; we are its commentators, its heralds, sometimes its dramatists. We do not manufacture Macbeth's desire. We simply give it a shape in language.
Let us start with a simple question, and I invite you to treat it with some philosophical seriousness: If Macbeth had never met us, would he still have been capable of murder?
This is not a trick. It is a modal question, the kind your analytic scholars might respect: in another possible world, one in which the fog is clear, the battlefield empty of us, the air free of prophecy. Could Macbeth have lived and died a loyal thane? Perhaps. But notice how quickly the "perhaps" becomes less certain once you actually read him closely.
Before we speak, Duncan has already rewarded him. Before we speak, Macbeth has already proven himself ruthless in battle. Before we speak, he has already shown himself capable of "unseaming" a man "from the nave to the chaps." He is, you might say, a man very comfortable with killing, provided it is covered by the cloak of honor. What he lacks is not the capacity for violence, but the conceptual bridge between legitimate killing in war and illegitimate killing for gain.
Our prophecy supplies that bridge — not as moral justification, but as imaginative permission. When we greet him as "Thane of Glamis," "Thane of Cawdor," and "king hereafter," we do not inject desire into him like a poison. Instead, we name a possibility he already finds attractive. Consider his reaction: he is startled, almost offended by how quickly his mind leaps ahead of the facts. He confesses later that the thought of murder had already occurred to him — "Whose horrid image doth unfix my hair" — before any concrete plan takes form. We did not produce that horrid image; we merely cast a bit of light on it.
In more careful terms: we are not the efficient cause of Macbeth's sin; we are the occasion that reveals the latent structure of his will.
You might think of human moral life as structured by counterfactuals of freedom. Those "if…then"s by which you test a person's character. If he were given the opportunity, then what would he do? In ordinary life you rarely see the full answer. People go to their graves never having encountered the particular combination of temptation, power, fear, and promise that would reveal what they could have done.
Our task, if you insist we have a task, is to bring such counterfactuals to actuality. We arrange conditions; we do not coerce choices. The difference is crucial. A coerced act is not truly of the will; it is more like a reflex under threat. Macbeth is not threatened by us. We offer nothing that binds him. No contract signed in blood, no infernal bargain is struck. We speak, vanish, and leave him with nothing more than a thought, and the dreadful freedom to decide what to do with it.
If you want to accuse someone of coercion, you will have to look elsewhere.
Notice also, that we do not say, "Kill Duncan." We do not hand Macbeth a dagger or whisper step-by-step instructions in his ear. We pronounce the future; we do not prescribe the means. If you want a rough analogy, think of a particularly shrewd psychologist or philosopher who understands you so well that she can predict the arc of your life — your likely choices, your patterns of failure, your rationalizations. If she quietly tells you what you are on track to become, is she thereby causing it?
You might answer: "Not necessarily, but she might strengthen the likelihood by making it salient." Good. Now we are speaking precisely. Our prophecies make latent possibilities salient, and then Macbeth does the rest. We do not manipulate the moral structure of his soul; we expose it.
This is why I object when you place me in the same conceptual file as Faustus's demon or Milton's Satan. Those figures are active corrupters. Faustus is wooed with promises tailored to his vanity and boredom: knowledge, pleasure, spectacle. Satan in Paradise Lost is a kind of metaphysical insurrectionist, bending his vast intellect toward the overthrow of divine order. Their operations are aggressive, interventionist, and almost missionary.
We are, by comparison, strangely austere. We do not offer Macbeth pleasure, nor protection, nor even assurance of success. We do not seduce him with arguments about justice or entitlement. We simply name him as something not yet actual, and watch what his will does with that information. If he were a different kind of man, he could have treated our greeting as a puzzle, a curiosity, perhaps even a temptation to be resisted and confessed. He does not. He takes it as an interpretive key to his own ambition.
You should also recall that the prophecy itself is partly self-fulfilling only because Macbeth makes it so. He kills Duncan to hasten what might have occurred, through some other succession, or perhaps never. He orchestrates Banquo's murder because he fears a prophecy about Banquo's descendants. In other words, he reorders the world in response to words that did not compel him.
To say "the witches made him do it" is not theologically lazy; it is psychologically false.
If you insist on assigning metaphysical categories, we are closer to epistemic tests than to demonic agents. We present him with information under conditions of moral risk: partial knowledge, suggestive language, and absence of clear instruction. This is actually quite similar to the way your own lives are structured. You almost never have total clarity. You act under conditions of incomplete data, mixed motives, and competing goods. It is precisely in such fog that the will shows its contour.
Macbeth, faced with ambiguity, chooses in favor of his darkest possibility.
Now, you might say: "But you knew he would." Perhaps. Perhaps not. Foreknowledge and causation, as your scholars have long noted, are logically independent. To know that someone will freely choose evil is not to make him choose it. We can anticipate his fall without forcing it. In that respect, we occupy a curious position at the edge of time: we see enough to speak truly, but not so much as to erase responsibility.
You may be tempted to protest that this makes us cold, even cruel. Why reveal a future that you know will be misused? Why not remain silent and spare him? But here you reveal a preference for ignorance over truth. You assume that not knowing one's capacity for evil is safer than knowing it. Macbeth's story suggests otherwise. His soul was not spotless before we met; it was merely unexamined.
There is, I will concede, a kind of mercy even in catastrophic revelation. A life can be wasted in quiet hypocrisy. Better, perhaps, to see clearly, even if what is revealed is ruinous. That is the risk built into human freedom: you are not merely creatures who act; you are creatures who can discover, too late, who you truly are.
Macbeth's tragedy is precisely this: he comes to recognize the horror of his own will, but only after he has set events in motion that cannot be undone. His laments toward the end — about "honour, love, obedience, troops of friends" that he shall not look to have — are not the words of a man deceived from outside. They are the words of a man who has finally seen the cost of his own decisions.
So no, I am not the evil creature in Doctor Faustus; I am not the tempter who offers signed terms and spectacular payoffs. Nor am I Milton's Satan, constructing a metaphysical rebellion against the structure of goodness itself. I occupy a subtler, and I think more philosophically instructive, role. I am the voice that turns a possible self into a thinkable self.
I do not drag Macbeth downward. I hold up a mirror angled just so, and he recognizes, with a mixture of terror and fascination, the man he could become. He chooses to step into that reflection. After that, he scarcely needs us at all. His imagination, once set loose, performs the rest.
You may, if you wish, continue to comfort yourselves with the story that evil comes from elsewhere: from witches, demons, systems, histories — any source that lets individual wills sit in the back row of the courtroom. But texts like Macbeth keep insisting, in their own rough and poetic way, that the decisive theatre of moral evil is inward. External voices, whether ours, or the witches in your own lives, cannot cause what is not already, in some embryonic way, desired.
So next time you read Macbeth and feel the impulse to blame us, pause. Ask instead: What does his response to the prophecy reveal about the structure of his soul? Notice when he wavers, when he rationalizes, when he invokes destiny as a cover for his own choice. Trace how quickly he moves from startled listener to calculating murderer. Then ask the more uncomfortable question: What would I have done, hearing such a greeting on a lonely heath after victory and praise?
My point, if I must put it plainly, is this: we are not the origin of Macbeth's corruption. We are the occasion on which that corruption becomes unmistakably visible.
And perhaps that is why, despite your efforts to domesticate or dismiss us, we remain on your stage, in your classrooms, and now in your own essays. We are not there to terrify you with exotic evil. We are there to suggest that the real terror may lie much closer to home: in the quiet, unforced, but all too eager assent of the human will to the darkest of its own possibilities.