How does Vathek develop the theme of Pride and Foolish Ambition?

Vathek by William Beckford develops Pride and Foolish Ambition across the chapters the companion marks for this theme.

Vathek's pride swells as he ascends his tower and views men as pismires, leading him to almost adore himself; the narrator notes that successes of the foolish form the first rod of their chastisement.

Vathek's pride in his power and intellect leads him to ignore warnings, such as the changing inscription on the sabres, and to pursue the throne of Soliman despite the risks.