foreshadows the use of trickery and witchcraft in the play because of the Witches presence,
restablishes Macbeth as an untrustworthy, corrupt character.
his first words recall the Witches opening chants. two tied together, a their roles in the play complement each other.
Witches use appearance to deceive Macbeth, who in turn betrays his own kinsmen and friends.
Macbeth's motive for his deception is his lust to be king suggest power is behind all evil and manipulation in the world. chain of influence: the citizens of Scotland obey their king, Macbeth, who obeys prophecies