From the novel; Macbeth
‘Thou losest labour
As easy mayst thou the interenchant air with kneel sword impress as make me bleed’
Macbeth contempt from Macduff’s effort in this battle scene arises from
- the quality of his military uniform
- the fact that he cannot be hurt by mortals
- the fact that the witches has given him charms
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the fact that the witches have made him think no mortal can hurt him
- the fact that he is as light as Air.