In act 1 of Macbeth, Macbeth meets three witches which spark an evil ambition that he should kill king Duncan and take his place and become king. The witches say that he will also be the thane of Cawdor. Macbeth then murders king Duncan.
Foul is fair and fair is foulHover through frog and filthy air.
Yes as the sparrows, eagles, or the hare, the lion. If I saysooth, I must report they were as cannons over chargedwith double cracks; So they doubly redoubled strokesupon foe. Except they meant to bathe in reeking woundsOr memorize another Golgotha. I cannot tell. But I amfaint, my gashes cry for help.
Dismay’d not this to our captains, Macbeth and Banquo?