The quote reflects on the concept of time as a limited resource that can easily slip away. The character grapples with the notion of having control over his time, perceiving it as something he can manage like finances. However, this illusion is shattered by the reality that time is inherently finite and unpredictable.
This perspective emphasizes the futility of trying to fill one's time with activities, as it ultimately leads to the realization that the passage of time is inevitable. The character must confront the urgency of existence and the notion that, despite efforts to occupy time meaningfully, it continues to drain away, highlighting a deep existential concern.