He got his driver's license, he got his high school diploma, he got his university degree. He got a worried little furrow between his eyes. He did what he thought was expected of him, and brought the official pieces of paper home to her like a cat bringing dead mice. Now it's as if he's given up because he doesn't know what else to bring; he's run out of ideas.
The passage reflects a sense of achievement accompanied by an underlying dissatisfaction. The character completes significant milestones in life, such as obtaining a driver's license, high school diploma, and a university degree, which society often deems necessary for success. However, these accomplishments do not fulfill him, as they fail to address deeper emotional or existential needs.
Despite striving to meet expectations and present tangible achievements, he feels a growing emptiness. The metaphor of presenting "official pieces of paper" like a cat brings dead mice suggests that, although he has met societal standards, he is left feeling hollow and uncertain about his future, as if he has exhausted his potential for new ideas or directions in life.