Macbeth agonizes over whether or not to kill Duncan, saying that he knows the kings murder is a terrible sin
Why does this have to be hard? I wish it was easy. If I could kill him quickly I would. I want to be king, but Duncan trusts me.
Macbeth is too nice and will never do anything to get me the power he promised. He was told by the fates that he will be king but he wants to sit idly by and let happen what may. I wish I was a man so that I could kill Duncan and be the king.
You need to do this for us. You made a promise to me and you need to keep it. You will only be a man once you kill Duncan.
This conversation is over.
We'll wait until Duncan is asleep, then we will get his guards drunk. Then murder Duncan and lay the blame on the two drunken guards.