An ending and a beginning
Nothing is forever. Creation ends with destruction and the ending of birth is death. Everything, from mountains to humans, and our creations, is finite. The processes may be dissimilar but the only certainty is change.
Inevitably, everything breaks down to its constituent parts for the cycle to begin again.
We fear this change, it is a reminder of our own mortality, of things we cannot control. Natural processes are still more powerful than we are, despite our science and technology. We fight a constant battle to prevent these processes, but cannot hope to succeed. Nature will have its way.