When the missives from the king saluted him Glamis and Cawdor, he attributed more than mortal knowledge to the weird sisters; and at once the terrible temptation to gratify his ambition by murder seized his soul, and conscience began to struggle with it. This struggle, in all its dread import, he pictured forth as he delivered the ensuing soliloquy with speaking features and in quick low tones of suppressed questioning eagerness:
“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?
My thought, whose murder yet is but fantastical,