The sunset: an evolution of color across the sky--performed for everyone in the world every single day. There is little more serene than a good sunset. While it can last hours, one artist has managed to whittle the experience down to a single moment.
The routine of life, like the cycle of the sun pictured here, carries on after death. One has to live on wondering if they will be remembered after their part in the cycle ends. This idea of uncertainty in death is reminscent of the poem "The Tide Rises, the Tide Falls" by Henry Wadsworth Longfellow in which the traveler's footprints, though seemingly lost, become part of something much bigger than the traveler.