Marlene B., I looked up that phrase you presented, which I was not familiar with. ... most applicable here.
Roy B., "used up" as in the "used up skeleton" you mention might be a one-sided view, because the skeleton is EQUALLLY at a beginning as well as an end - THAT's my greater point in the symbolism.
David B., my image on that subject would be quite different than yours, as I see a completely different side of the controversy. Check out my galleries for my visual retort, in the "Science Parodies" gallery.
Ed M., Infinity and Eternity are two sides of the coin, and Mortality is the thin mass in between.