The character in Miguel de Cervantes' "Don Quixote" becomes completely consumed by his reading, dedicating all his time and energy to his books. He reads both day and night, which leads to an obsession that isolates him from reality. This excessive focus on literature causes him to neglect essential aspects of life, including rest and social interaction.

As a result of his relentless pursuit of knowledge, he begins to lose touch with reality, ultimately driving him to madness. His obsession transforms him into a character who cannot distinguish between the stories he reads and the real world, illustrating the potential dangers of excessive escapism through literature.