Here's a breakdown of the idea:
* The Tide Rises: The rising tide represents the ebb and flow of life, constantly changing and moving forward. It symbolizes the transient nature of human existence.
* The Tide Falls: The falling tide signifies the inevitable end of life, the passing of time, and the return to a state of quietude.
* The Contrast: The juxtaposition of the rising and falling tide highlights the contrast between life and death, change and permanence. While the tide continues its cyclical movement, the human life cycle is finite.
The poem uses the natural imagery of the tide to underscore the larger themes of mortality and the enduring power of the natural world. The tide keeps rising and falling, regardless of the lives that come and go.