Its better to wear out than to rust out.

All other men, being born of woman, have a navel, by reason of the umbilical vessels inserted into it, which from the placenta carry nourishment to children in the womb of their mothers but it could not be so with our first parents. It cannot be believed that God gave them navels which would have been altogether useless.

I do not mean to expose my ideas to ingenious ridicule by maintaining that everything happens to every man for the best but I will contend, that he who makes the best use of it, fulfills the part of a wise and good man.