Answer:
What liquid can contain the soul?
Hoofed frolicking.
As soft as silk, as white as milk, as bitter as gall, a thick green wall, and a green coat covers me all.
I move without wings, Between silken string, I leave as you find, My substance behind.
In we go, out we go. All around and in a row. Always, always steady flow. When we'll stop, you'll never known. In we go, out we go.
What did the piece of wood say when he saw the screwdriver and screws approaching?