The setting sun symbolizes the completion of a journey. This journey could be life itself. The twilight of human life is often compared metaphorically with the setting sun.
The sunset symbolizes the completion of a day’s work and shows the passage of time. As the sun sets, it is time to end the day and take a break. The awesome beauty of the setting sun is also symbolic of the beauty and mystery of life itself. The setting sun is nature’s way of reminding humanity about the forces of good and evil. As the sun sets, light fades, which is symbolic of the forces of darkness.