" Only the human spirit can act with volition and consciously change itself; it is the only thing in all creation that is not entirely at the mercy of forces outside itself, and it is, therefore, the most powerful and valuable form of energy in the universe. For a time, the spirit may become flesh, but when that phase of its existence is at an end, it will be transformed into a disembodied spirit once more. "

― Dean Koontz , Sole Survivor