what is the main idea of chapter 1 in the chamber of secrets

Power is the main theme or idea in chapter 1.The chapter establishes the relationship between Harry and his family. There is no love between them, and it is clear that Mr. Dursley feels threatened by Harry and his magical powers. The issue of power is interesting here, as Mr. Dursley is important and powerful in his position as head of the house. Harry is the least important person in the household, yet is powerful because of his magical abilities. He also has power over Mr. Dursley because Mr. Dursley is frightened by Harry's magic, and this makes him weak. The Dursleys don't understand magic, having no magical abilities themselves, and they symbolize the views of the rest of the Muggle (non-magical) population. Consequently, the opening chapter is charged with tension and suspense because of the initial argument and powerful underlying emotions.