How influential was the supernatural in the play Macbeth?

In the next scene Duncan and a sergeant discuss the battle that has just been fought.  They also discuss how brave their two captains were Banquo and Macbeth.  ‘As cannons overcharg’d with double cracks; so they doubly redoubled strokes upon their foe’.  This is an important scene because it shows how brave and valiant Macbeth was at first.  He was ready to sacrifice himself for King and country; this shows that he is devoted to his King.  The next scene shows the three witches it seems like that they are concocting a spell but it also shows how powerful they are ‘But in a sieve I’ll thither sail, And, like a rat without a tail, I’ll do, I’ll do, and I’ll do. ‘Here I have a pilot’s thumb, wreck’d as homeward he did come’.  Macbeth and Banquo are travelling along a trail and they meet the three witches.  The three witches hail Macbeth ‘All hail, Macbeth! Hail to thee, Thane of Glamis!  All hail Macbeth!  Hail to thee, Thane of Cawdor!  All hail, Macbeth!  That shalt be King hereafter.  Banquo is not alarmed by the appearance of the three witches.  He questions Macbeth and the three witches calmly. ‘Good sir, why do you start, and seem to fear things that sound so fair?’  Macbeth is shocked and scared by the witch’s prophecies.  Banquo’s speech is calm and composed.   In this scene Macbeth thinks about murdering the King for the first time.  But then his common sense returns and he thinks about how divine and holy the King is.  He thinks about why he wants to murder the King and realizes that he only wants to because of his vaulting ambition.  He is disgusted by himself and so he makes his mind up against the idea of killing the King.  He tells his wife that it will go no further.  She has always supported him and been a loving wife but she berates him insulting his manhood and calling him a coward. ‘And live a coward in thine own esteem’.  This could already show that the supernatural has some sort of hold over Lady Macbeth.  Macbeth feeling down due to Lady Macbeth’s insults agrees to the murder.  The next scene shows that both Banquo and Macbeth are disturbed by the three witches as Banquo calls for his sword.  Banquo’s quote of ‘There’s husbandry in heaven’ This could relate to the fact that Elizabethans where very superstitious and believed that if something was wrong it was due to something happening in the heavens.  Macbeth has hallucinations.  ‘Is this a dagger which I see before me, the handle towards my hand?  Come let me clutch thee’   He hallucinations are about performing a very bloody and violent murder of the King.  ‘And on thy blade and dungeon gouts of blood, which was not so before.’  This next quote shows that the murder has now been personified.  ‘With Tarquin’s ravishing strides, towards his design moves like a ghost’  ‘Take the present horror from the time.’  Macbeth has now committed the murder and he returns to Lady Macbeth.  Lady Macbeth is waiting for her husband to return she seems delirious as she talks to herself ‘What hath quench’d them hath given me fire. Hark!  Peace!  It was the owl that shriek’d, the fatal bellman.’  This compares to the bellmen who rang the funeral bell for condemned prisoners at Newgate.  Macbeth enters the chamber with hands stained with Duncan’s blood.  Macbeth’s first words are ‘I have done the deed, did thou not hear a noise?’  Lady Macbeth’s answer is lined with things that the Elizabethans found superstitious ‘I heard the owl scream and the crickets cry.’  The Elizabethans thought that a crickets chirp heralded death.  Macbeth then seems to come out of a trance that the witches may have put on him.   He instantly regrets the murder that he has just committed.  ‘This is a sorry sight’.  While Macbeth is regretful again Lady Macbeth berates him she seems to be under the witches influence a lot more while Macbeth seems to have broken the spell. ‘A foolish thought to say a sorry sight.’  Though Macbeth seems to have broken the spell the witches seem to have cursed him and Lady Macbeth.  ‘Methought I heard a voice cry ‘Sleep no more!  Macbeth does murder sleep’-the innocent sleep, Sleep that knits up the ravell’d sleave of care, the death of each day’s life