I noticed this quote on an abandoned Blogger site today.
Photographers deal in things which are continually vanishing and when they have vanished there is no contrivance on Earth which can make them come back again. – Henri Cartier-Bresson
It applies to almost everything photographed. From a smiling child to the sun itself. Nothing stays exactly the same forever and the photographer won’t be standing in the same spot, with that same angle, at that same time either. Something will be different, maybe just the weather. Maybe how the photographer feels or gets different perspective. Life is about change, but a photograph can capture what was there, while it was there.
This is what rephotography can showcase. The changes over time and other changes to our culture.