More on Malcolm and Macduff dynamic can be better understood by watching this scene. Malcolm tests Macduff's loyalty by saying he'd be a worse king than Macbeth.
What would Malcolm be like as King?
ACT V Scene 1:
It is an accustomed action with her, to seem thusLADY MACBETH
washing her hands: I have known her continue in
this a quarter of an hour.
Out, damned spot! out, I say!--One: two: why,Doctor
then, 'tis time to do't.--Hell is murky!--Fie, my
lord, fie! a soldier, and afeard? What need we
fear who knows it, when none can call our power to
account?--Yet who would have thought the old man
to have had so much blood in him.
The thane of Fife had a wife: where is she now?--Doctor
What, will these hands ne'er be clean?--No more o'
that, my lord, no more o' that: you mar all with
Here's the smell of the blood still: all theDoctor
perfumes of Arabia will not sweeten this little
hand. Oh, oh, oh!
This disease is beyond my practise: yet I have knownLADY MACBETH
those which have walked in their sleep who have died
holily in their beds.
Wash your hands, put on your nightgown; look not so
pale.--I tell you yet again, Banquo's buried; he
cannot come out on's grave.