In William Faulkner's "As I Lay Dying," the idea of identity and existence is explored through the concept of sleep. The quote suggests that in a disorienting space, one must let go of their consciousness to fall asleep. This process of emptying raises questions about one's essence and reality, contemplating what a person is before and after this state of unconsciousness.

The contemplative nature of the quote reflects a deep uncertainty regarding self-identity. As the narrator grapples with the nature of being filled with sleep, they express confusion about their own existence, pondering whether they truly are or if they merely perceive themselves as existing. This existential inquiry emphasizes the fragility of human identity and the elusive nature of self-awareness.