The quote from Annie Dillard's "The Writing Life" emphasizes the importance of being selective about the sources of information and inspiration that a writer engages with. It suggests that the materials one reads and the knowledge one acquires significantly influence the writing produced. Thus, a writer must be deliberate in their choices to ensure that they cultivate the right ideas and themes in their work.

Dillard's insight extends beyond writing to the broader concept of learning and knowing. It highlights that our experiences and education shape our understanding of the world. By carefully choosing what to learn, a person can develop a meaningful and thoughtful perspective, which ultimately informs their communication and creativity. This mindful approach can lead to deeper, more impactful writing and expression.