Conscience - continually appears throughout course of play. It eventually eats away at Lady Macbeth enough to cause her to go mad. The guilty conscience of Macbeth causes him to hallucinate about a bloody dagger and the ghost of Banquo.
The Supernatural- This theme appears during the play in the form of the Witches, who use metaphysical practices to determine the future of Macbeth. This theme also appears when Lady Macbeth turns to "spirits that tend on mortal thoughts" (qtd. Shakespeare 35) to fill her with cruelty.
Ambition
/ Greed - the story of Macbeth clearly relates to ambition and greed.
Although, in the beginning, it is Macbeth's ambition to become the king
of Scotland, the story reaches a point where his ambition reaches too far,
and turns into greed. In the beginning, he killed Duncan to satisfy
his ambition to be king. Soon, however, greed takes the place of his ambition.
Once he becomes king, he suddenly decides that he wants to ensure that
the throne will be kept in his family, and, as a result, he kills Banquo.
When he is warned by the witches to "beware Macduff," he quickly kills
his family. Whereas in the beginning, when his desire to be king was a
simple ambition, Macbeth was eventually consumed with greed. He went to
great lengths to rid Scottland of those against him, and turned into a
tyrant, obsessed with his new powers.
Power - When Macbeth becomes king, he feels he is superior, and almost invinsible to any forces that may try to block his paths. He becomes so obsessed with his new power, that he uses it to defend what he believes should be, his rights as the king of Scotland. This includes killing Banquo, attempting to kill Fleance, and killing Macduff's entire household.
Good
Vs. Evil - The conclusion of the play reflects the idea that good
will always win out over evil. No matter how much it seemed, over
the course of the book, that Macbeth would find a way to keep the throne
in his family and keep from being murdered or overthrown, his evil actions
were no match for good. In the end, Macbeth and Lady Macbeth, both villans,
are killed, and Scotland is placed under the control of Malcolm, who is,
unlike Macbeth, honest and true.