Hi Lynn,
It is helpful to point out that there are basically two types of energy that exist, universal and spiritual. Universal energy pretains to the physical universe, as well as our physical bodies. "There are laws to the physical universe", physical energy, that we are all subject too.

By working with universal energy and spiritual energy, which is unlimited, we can transformatively work with the energy. Life style is a big factor in this. So, we can work with the energy in ways that promote health and long life. Spiritual energy is more the wild card, and one certainly doesn't need to place boundaries on possibilities.

The last thing that the Buddha said upon his death was in reference to 'impermance', a concept you can do some further study on if you like. He basically said that anything that is created, will at some point pass. Then he said to strive on with diligence!
love,
gallen