From 11:00PM PDT on Friday, July 1 until 5:00AM PDT on Saturday, July 2, the Shmoop engineering elves will be making tweaks and improvements to the site. That means Shmoop will be unavailable for use during that time. Thanks for your patience!
Somewhere in the castle Macbeth sits alone, contemplating the murder of King Duncan. And it gets a little complicated. See, if it were simply a matter of killing the king and then moving on without consequences, it wouldn't be a big issue.
The problem is what happens afterward —the whole, being damned to hell thing. It's even worse, because murdering Duncan in Macbeth's own home would be a serious violation of hospitality. He's supposed to protect the king, not murder him. Plus, Duncan is a pretty good king (if not a bit "meek") and heaven is bound to frown upon murdering such a decent fellow.
In then end, Macbeth decides that it's probably not a good idea to commit murder. He has no justifiable cause to kill the king and he admits that he's merely ambitious.
And then Lady Macbeth enters.She gives him a good tongue-lashing, questions his manhood, and lays out the plan to get Duncan's guards drunk and frame them for the murder.
If Macbeth can't keep his vow, she says, then he isn't a man.
Macbeth is a little turned on by this show of strength, and he finally resolves to go through with the murder.