Fair is foul and foul is fair. (Duality & Technique & Context & Effect)
Duality: Good & Evil, Appearance & Reality
Technique: Metaphor
Context: Witches planning next place to meet each other and Macbeth.
Effect: The quote implies that good is bad and bad is good. It highlights that fact that appearances are often deceptive, hiding their true intentions.
Stars, hide your fires, let not light see my black and deep desires. (Duality & Technique & Context & Effect)
Duality: Good & Evil, Appearance & Reality
Technique: Personification & Metaphor
Context: Malcom has just become the prince is Cumberland. Macbeth is talking to the audience (aside) saying that he either has to step over him or give up because Malcolm is in the way.
Effect: Macbeth is calling on darkness/hell (evil) to hide his true dark desires from the light/heaven (good) but also his conscience.
Look like the innocent flower, but be the serpent under it. (Duality & Technique & Context & Effect)
Duality: Good & Evil, Appearance & Reality
Technique: Simile & Metaphor
Context: Lady Macbeth is telling Macbeth that in order to not be suspected of murdering King Duncan, he must make sure that he acts in a very specific way.
Effect: Shows that appearances can be hidden behind an act or "mask", hiding their true desires.
There's no art to find the mind's construction in the face. (Duality & Technique & Context & Effect)
Duality: Good & Evil, Appearance & Reality
Technique: Metaphor
Context: Duncan and Malcolm talking about the execution of Cawdor.
Effect: Describes the possible difference between a person's pleasing appearance and the reality of their wicked nature and that there is no way of knowing what someone is thinking just by looking at him.