Explain the following lines

The king and Gulliver have long conversations about politics, but the king never really considers Gulliver's opinions on important matters. Being small, Gulliver is considered petty, and the idea of gaining power through gunpowder is anathema to the king. Through Gulliver's discussions with the king, the reader learns that perspective extends beyond size to opinion. After several days of discussing the governments of England and Brobdingnag, the king declares the English to be "the most pernicious Race of Little odious Vermin that Nature ever suffered to crawl upon the Surface of the Earth." The King never acknowledges Gulliver's observtions and refuses to see anything from someone else's point of view. Again Gulliver's Travels brings light to the fact that people from different backgrounds often have different opinions on the same subjects, even though people tend to follow similar patterns. Gulliver finds that each people prefers its own ways, but a traveler who spends a long time elsewhere might (or might not) come to prefer the foreigners' ways over his own. Experience, thought, and tradition are important considerations in making this choice.