When the day is gone, youth comes naturally.
This poem eulogizes that although moss lives in a dark and humid place, it has its own life instinct and life intention, and will not lose the courage to grow because of the harsh environment. The whole poem personifies moss and integrates the poet's feelings and emotions into the creation of the image. It is full of rationality and interest, and the meaning is clear and profound. It is simple and clear and has a strong philosophical meaning.