Central idea: Oliver Twist describes the miserable life of poor children in capitalist society and exposes the darkness of poor shelters and school education. Appreciation of characters: In this book, Oliver, Nancy and Miss Ross are all representatives of kindness. They were all born in misery and grew up in a dark and sinful world, but they always kept a pure world and a kind heart in their hearts. All kinds of hardships can't make them degenerate or completely degenerate, but they show their dazzling crystal quality. In the end, evil prevailed over evil. Although Nancy was finally killed, it was her death that summoned the earth-shattering power of social justice, and it was her spirit in heaven that doomed the representative of evil forces-Fagin Gang. Therefore, in the novel, Nancy's spirit is sublimated, and Oliver is rewarded in a typical sense. The representatives of the wicked-Fagin, monks, Bambur and Essex all came to a tragic end.