"This supernatural soliciting. Cannot be ill, cannot be good. If ill, Why hath it given me earnest of success Commencing in a truth? I am Thane of Cawdor. If good, why do I yield to that suggestion Whose horrid image doth unfix my hair And make my seated heart knock at my ribs Against the use of nature?"
Is Macbeth saying that the witches' prophecy is unreliable, amoral, is Macbeth both attracted and repelled by the prophesy or all of them.
http://nfs.sparknotes.com/macbeth/
Find the act and scene you need, and be sure to read the RIGHT HAND column to see if your interpretation is correct.
In this passage from Shakespeare's play Macbeth, the character Macbeth is reflecting on the supernatural soliciting (the prophecy) he received from the witches. Let's analyze his words to understand his perspective more clearly.
Macbeth begins by saying, "This supernatural soliciting. Cannot be ill, cannot be good." Here, he suggests that the prophecy is neither inherently evil nor inherently good. He then questions the supernatural soliciting, wondering why it has given him a truthful promise of becoming the Thane of Cawdor if it is indeed evil. Conversely, if the prophecy is good, he wonders why it has sparked in him such disturbing thoughts that unsettle him deeply.
Macbeth's words indicate that he is both attracted and repelled by the prophecy. He finds the idea of becoming the Thane of Cawdor enticing and feels that the prophecy has offered him a glimpse of success. However, the "horrid image" of committing crimes and betraying his current position terrify him and go against his natural instincts.
Therefore, in this passage, Macbeth is expressing a complex mix of emotions. He questions the reliability and morality of the witches' prophecy, and he experiences both attraction and repulsion towards it.