This quote insightfully captures the persistent nature of a writer's mind. Writing, especially when working on a novel, is not just a task confined to specific hours or places; it becomes an all-encompassing mental engagement. The idea that a writer cannot simply switch off their imagination at will resonates deeply with anyone who has experienced creative work. It highlights both the gift and the challenge of a writer’s life: the continuous internal dialogue and world-building that pervades even moments of rest.

The inability to stop thinking about the project suggests an immersion so intense that the boundaries between work and leisure blur. While this can be exhausting, it also points to the passion that fuels creativity, pushing the writer to develop their work incessantly. The restless imagination keeps ideas flowing but may also lead to mental fatigue or stress.

From a broader perspective, this restless imagination reflects the nature of creativity itself — unpredictable, uncontrollable, and sometimes burdensome. Writers often must learn to channel their thoughts effectively, balancing the ceaseless flow of ideas with practical needs for breaks and mental health. Overall, this quote shows the dual edge of imaginative work: it is both a blessing for the richness it provides and a challenge for the persistent mental presence it demands.