To me this has a heavy flavour of reincarnation and associated ideas. That you have been a part of past people and things, recombined to our current incarnation, only to be dissasembled and reincorporated into something else. The Circle of Life, as Disney saw fit to put it in The Lion King.

Ashes to ashes, dust to dust.

You are also (at the start) a large portion of your mother's cellular matter. A different spin on the nature vs. nurture issue.