Answer:
Salty water everywhere but not sea in sight.
It is a part of us, and then replaced. It escapes out bodies, to a better place. The world becomes its sizeable home. Its passions unrestraint, the planet it roams.
What surrounds the world, yet dwells within a thimble?
Put into a pit, locked beneath a grate, guarded through the night, yet it still goes out.
I pass before the sun, but make no shadow.
What covers its face with its hands, speaks no language, yet most known what it's saying?