Read the excerpt. Lady Macbeth says Macbeth will be even greater than thane of Cawdor and Glamis. Why is this most likely to be persuasive?

Lady Macbeth’s promise that Macbeth will rise higher than his current titles appeals to his desire for greater power. Macbeth is ambitious, so the possibility of becoming more than thane of Cawdor and Glamis is likely to persuade him. Being strong, fearful, or private does not explain why this promise would appeal to him.

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