In this context, it represents the journey from life to death, often perceived not as an end, but as a transformation or a crossing into a different realm, existence, or spiritual plane. This description frames death as a natural, perhaps peaceful shift, like crossing a threshold, where one moves from the physical world to a mysterious, unknown, or even eternal one. It emphasizes continuity rather than abrupt finality, suggesting that life flows into death in a process of change rather than cessation.