This castle is in a pleasant place. The air is sweet and appeals to my refined senses.
Act 1 Scene 6
Act 2 Scene 1
There’s no dagger here. It’s the murder I’m about to do that’s making me think I see one.
Act 4 Scene 3
As Duncan makes his way to Macbeths castle he notices how nice and appealing everything is. It is ironic seeing as how this castle is the opposite of sweet. This castle seems pleasant but will soon be filled with bloodshed. Once again something is seen as the opposite of what it actually is.
A dagger appears before Macbeth and handle is pointed towards his hand. Almost as if it's pulling him closer and closer to killing the king, even though he knows the dagger isn't real. This foreshadows what will happen to Duncan since the knife is also pointing to the kinds room. Then blood appears on the knife which shows that Duncans fate is sealed. This apparition also pushes Macbeth to commit the crime.