@ fulhamish
I did mention entropy a while ago, in referencing the driving force behind both progress and destruction. The entropic principle (things running out of energy) is the driving force behind the universe, after all. Without death and decay, there would be no life, no change, only stasis meaning nothing.
the very physics that drive out bodies towards death are the same forces that allow us to progress, change and grow. Everything is eventually broken down into its elements, and scattered again to be reborn, on this planet for now, but eventually on different planets and suns. Who knows how many times the material of our bodies has been reconstituted in the past, in some alien rock, or plant, or being? Without the grinding down of life from entropy, nothing would have been created. And so death then, perhaps the most powerful and awesome force in the universe -- the taker, and the giver.
This is why I reject the notion of "eternal life" as many religions would describe it. There is no way the present can continue forever. There is only process and change. In every moment, everything is perfect and complete, but at the same time changing, evolving, and becoming something new. Eternity is now. Eternity is process.