• taunts
• terror
• Glamis
• happier
• spirits
• Duncan
• head
• brains
• plans
• heath
• serpent
• stage
• execute
• stumbling
• Weird
• guards
• cruelty
• Scotland
• loyalty
• sticking
• vanish
• ruthless
• letter
• Malcolm
• sin
• prophecy
• king
• battle's

On a heath in , three witches, the Sisters, wait to meet Macbeth amidst thunder and lightning. Their conversation is filled with paradox, equivocation and mystery: they say that they will meet Macbeth "when the lost and won" and when "fair is foul and foul is fair" (10).

Act 1, Scene 2

The Scottish army is at war with the Norwegian army. , king of Scotland, meets a captain returning from battle. The captain informs them of Macbeth and Banquo's bravery in battle. He also describes Macbeth's attack on the castle of the treacherous Macdonwald, in which Macbeth triumphed and planted Macdonwald’s on the battlements of the castle. The Thanes of Ross and Angus enter with the news that the Thane of Cawdor has sided with Norway. Duncan decides to the disloyal thane and give the title of Cawdor to Macbeth.

Act 1, Scene 3

The Weird Sisters meet on the and wait for Macbeth. He arrives with Banquo, repeating the witches' paradoxical phrase by stating "So foul and fair a day I have not seen" (36). The witches hail him as "Thane of " (his present title), "Thane of Cawdor" (the title he will soon receive officially), and "hereafter" (46-48). Their greeting startles and seems to frighten Macbeth. When Banquo questions the witches as to who they are, they greet him with the phrases "Lesser than Macbeth and greater," "Not so happy, yet much ," and a man who "shall get kings, though [he] be none" (63-65).

When Macbeth questions them further, the witches into thin air. Almost as soon as they disappear, Ross and Angus appear with the news that the king has granted Macbeth the title of Thane of Cawdor. Macbeth and Banquo step aside to discuss this news; Banquo is of the opinion that the title of Thane of Cawdor might "enkindle" Macbeth to seek the crown as well (119). Macbeth questions why such happy news causes his "seated heart [to] knock at [his] ribs / Against the use of nature," and his thoughts turn immediately and with to murdering the king in order to fulfill the witches' second (135-36). When Ross and Angus notice Macbeth's changed state, Banquo dismisses it as Macbeth's unfamiliarity with his new title.

Act 1, Scene 4

Duncan demands to know whether the former Thane of Cawdor has been executed. His son assures him that he has witnessed the former Thane’s becoming death. While Duncan reflects about the fact that he placed "absolute trust" in the treacherous Thane, Macbeth enters. Duncan thanks Macbeth and Banquo for their and bravery. He consequently announces his decision to make his son Malcolm the heir to the throne of Scotland (something that would not have happened automatically, since his position was elected and not inherited). Duncan then states that he plans to visit Macbeth at his home in Inverness. Macbeth leaves to prepare his home for the royal visit, pondering the block of Malcolm that now hinders his ascension to the throne. The king follows with Banquo.

Act 1, Scene 5

At Inverness, Lady Macbeth reads a from Macbeth that describes his meeting with the witches. She fears that his nature is not enough-- he's "too full o' th' milk of human kindness” (15)—to murder Duncan and assure the completion of the witches' prophesy. He has ambition enough, she claims, but lacks the 'illness' (cruelty) to act on it. She then implores him to hurry home so that she can "pour [her] in [his] ear" (24)—in other words, goad him on to the murder he must commit. When a messenger arrives with the news that Duncan is coming, Lady Macbeth calls on supernatural powers to "unsex me here" and fill her with , taking from her all natural womanly compassion (39). When Macbeth arrives, she greets him as Glamis and Cawdor and urges him to "look like the innocent flower, / but be the under’t" (63-64). She then says that she will make all the preparations for the king's visit and subsequent murder.

Act 1, Scene 6

Duncan arrives at Inverness with Banquo and exchanges pleasantries with Lady Macbeth. The king inquires after Macbeth's whereabouts and she offers to bring him to where Macbeth awaits.

Act 1, Scene 7

Alone on , Macbeth agonizes over whether to kill Duncan, recognising the act of murdering the king (regicide) as a terrible . He struggles in particular with the idea of murdering a man who trusts and loves him. He would like the king's murder to be over and regrets the fact that he possesses “vaulting ambition" without the ruthlessness to ensure the attainment of his goals (27).

As Lady Macbeth enters, Macbeth tells her that he "will proceed no further in this business" (31). But Lady Macbeth him for his fears and ambivalence, telling him he will only be a man when he carries out the murder. She states that she herself would go so far as to take her own nursing baby and dash its if necessary. She counsels him to "screw [his] courage to the place" and details the way they will murder the king (60). They will wait until he falls asleep, she says, and thereafter intoxicate his with drink. This will allow them to murder Duncan and lay the blame on the two drunken guards. Macbeth is astonished by her cruelty but resigns to follow through with her .