Energy cannot die it only changes form (Albert Einstein) and Every thing reincarnates and the vital energy source is the spirit or soul. Humans (animals) have souls and even plants have soul. Every thing alive has a soul or it would not function and be alive. Gods and Vampyres have souls as well but on a spiritual level. We also have human bodies; some believe our soul may be human as well since we where born both Vampyr spirit as well as Human depending on our lineage and strength of Vampyr in us. Most Vampyres especially Priests or Fathers are more spiritual than physical in nature. Stress and worry seem to rob us of our energy and the fact that our spirit is a powerful force as we are Gods and can drain the Human body we inhabit this is why we need to feed on others to remain healthy
We are all Spiritual creatures: Human, Vampyr, and Other kin alike. We all have the ability to be Gods or Goddesses, the more we use what we have in our spiritual souls our energy centers. As Vampyres and Other kin we are more in tune with our spiritual selves than normal humans, and the more work on our psychic abilities the more Divine or Godly we become. The eastern religions such as Taoism believe that all people are able to become Gods if we work hard enough on ourselves, and I agree with that philosophy. Human bodies are easily weakened by sickness, disease and labor because Humans are animals (as science has proven), but our souls or psyche becomes stronger the more we use it and learn how to use it more efficiently.