To all things there is a pattern. Life as nature has a certain rhythm. Old things pass away and new things take their place. As one flower blooms, another goes out of season. To each thing there is a time. In all things this rhythm exist. In some instances it can be seen, and others it is more subtle. No one can truly say why some things exist longer than other, only that the rhythm continues beyond mortal time constraints, constantly rebalancing itself. So that it can maintain the flux of the journey that everything is set on.