Which aspect of Gulliver's personality is tested through his experiences in Brobdingnag?

In Brobdingnag, Gulliver finds himself in a land inhabited by giants, which profoundly affects his understanding of power dynamics. Throughout his interactions with the Brobdingnagians, particularly with their king, Gulliver's perspective on size, strength, and authority is challenged. As a tiny figure in a world where everything is magnified, he experiences vulnerability unlike anything he faced in Lilliput, where he was the giant.

The king of Brobdingnag represents a different kind of power; he embodies reason and morality, contrasting sharply with the petty politics of Lilliput. This encounter prompts Gulliver to reflect on the nature of power, ethics, and governance, ultimately leading him to conclude that the size and might of a ruler do not necessarily reflect their wisdom or virtue. Thus, Gulliver's stay in Brobdingnag serves to test and deepen his understanding of power dynamics within various societies.