Final answer:
In Shakespeare's 'Macbeth', Donalbain's statement 'The near in blood, The nearer bloody' implies that those who are closely related are more likely to be threats to one another in scenarios of power struggles.
Step-by-step explanation:
Donalbain's line 'The near in blood, The nearer bloody' suggests that family members or close relatives are more likely to be a threat to one's safety, especially in the context of a power struggle or royal intrigue like the one taking place in Shakespeare's Macbeth. This line reflects the paranoia and fear that grips characters in the play after King Duncan's murder. Donalbain fears that being in close proximity to the throne (and thus, close in blood relations) makes one more susceptible to violence or murderous plots. This motif of blood is prevalent throughout Macbeth, symbolizing guilt, treachery, and the consequences of ambition.