Lady Macbeth is alone reading the letter from Macbeth, in which describes his meeting with the witches and the witches' prophecies. She fears that he doesn't have what it takes to kill King Duncan and fulfill the witches prophecies.
Yet do I fear thy nature; it is full o' th' milk of human kindness to catch the nearest way. (page 412, lines 13-15)
See, see, our honored hostess! (page 414, line 10)
All our service, in every point twice done and then done double, were poor and single business to contend against those honors deep and broad wherewith Your Majesty loads our house. (page 414, lines 14-18)
Lady Macbeth greets King Duncan, Malcom, Donalbain, Banquo, Lennox, Macduff, Ross, Angus, and attendants in front of Macbeth's castle at Inverness.
We will precede no further in this business. He hath honored me of late. (page 416, line 31)
Macbeth struggles over whether or not to kill King Duncan, a good king who trusts and honors him. He tells Lady Macbeth that he doesn't want to kill King Duncan, but she tells him that he is a coward and that he will only be a man if he kills the king.
Art thou afeard to be the same in thine own act and valor as thou art in desire? Wouldst thou have that which thou esteem'st the ornament of life and live a coward in thine own esteem. (page 416, lines 39-43)