Horrible sight!—Now I see ’tis true; / For the blood-bolter’d Banquo smiles upon me, / And points at them for his.—
Act IV, Scene 1 · Macbeth
Context
Macbeth sees Banquo's ghost appear at the end of the procession of kings, smiling and gesturing toward them as his descendants.
Analysis
The adjective 'blood-boltered' (matted with blood) makes Banquo's ghost a visual accusation—the blood Macbeth spilled is still visible, yet Banquo 'smiles,' a gesture of triumph rather than suffering. This inverts the usual ghost's function: instead of haunting Macbeth with guilt, Banquo's ghost taunts him with success, showing that the murdered man has won the future while the murderer has gained nothing lasting.
Essay Tip
Support a thesis that Macbeth is haunted not by moral guilt but by the failure of his ambition—Banquo's ghost smiles because his line will reign forever, and the blood imagery here marks Macbeth's crime as futile rather than simply evil.