"Nature seems dead, and wicked dreams abuse the curtained sleep"
Foreshadowing the collapse of the Great Chain of Being - Monarch displaced
Links to witches - foreshadows Macbeth becoming the wicked one - "something wicked this way comes"
Internal conflict - Doesn't want to commit regicide but must to prove masculinity
Sleep links to innocence and links to death (Greek myth: sleep + death are brothers)