Answer:
I have four wings but cannot fly. I never laugh and never cry. On the same spot always found, toiling away with little sound.
They're up near the sky, on something very tall. Sometimes they die, only then do they fall.
Whoever makes it, tells it not. Whoever takes it, knows it not. Whoever knows it, wants it not
I'm not really more than holes tied to more holes. I'm strong as good steel, though not as stiff as a pole.
What has two spines and a lot of ribs, and carries much but never moves?
I saw the dead bring forth the living. I saw the living bring forth the dead. What did I see?