That the Weird Sisters possess ... perennial and astounding vitality is attested by the whole sweep of Shakespearean criticism. All hands seem to be convinced that they symbolize or represent evil in its most malignant form, though there is to be found little unanimity of opinion regarding the precise nature of that evil, whether it is subjective or objective or both, whether mental or metaphysical. (pp. 55-6) The single purpose of this study is to examine, …showed first 75 words of 2465 total…

…showed last 75 words of 2465 total…strictest sense, one element in that Fate which God in his providence has ordained to rule over the bodies and, it is possible, over the spirits of men. And the essence of this whole metaphysical world of evil intelligences is distilled by Shakespeare's imagination and concentrated in those marvellous dramatic symbols, the Weird Sisters. (pp. 91-3) Walter Clyde Curry, "The Demonic Metaphysics of Macbeth," in his Shakespeare's Philosophical Patterns, Louisiana State University Press, 1937, pp. 53-93.