The distress Duncan's murder welcomes into the world is symbolised by Shakespeare's use of darkness and nightfall. The pathetic fallacy, with furious thunderstorms and thick layers of fog and darkness that the sun can't get through, creates an atmosphere of obscuirty and fear. Before the murder takes place, Banquo observes, "There's husbandry in heaven, / Their candles are all out," (2.1). The night is dark and starless, an omen for the hopeless, devastating future to come. He suggests that even heaven is acting suspicious and secretive, so that the whole world is against him. Furthermore, it seems Macbeth's wish has come true; the "stars" have extinguished their "fires". This is significant because it suggests Macbeth has a supernatural ability to control his environment and reality, provoking fear from the audience.