Answer:
What do you purposefully put lots of in and on your body, but run away from when you encounter it outside?
What is it which builds things up? Lays mountains low? Dries up lakes, and makes things grow? Cares not a whim about your passing? And is like few other things, because it is everlasting?
Until I am measured I am not known, Yet how you miss me when I have flown.
An open ended barrel, it is shaped like a hive. It is filled with the flesh, and the flesh is alive!
What comes once in a minute, twice in a moment, but never in a thousand years?
I have two bodies joined together as one. When standing still I run and run.