Answer:
I can be written, I can be spoken, I can be exposed, I can be broken.
When I'm born I fly. When I'm alive I lay. When I'm dead I run.
What breaks on the water but never on the land?
I am a box that holds keys without locks, yet they can unlock your soul.
Though not a plant, has leaves. Though not a beast, has spine. Though many wouldn't need this thing, It's more valuable than wine.
What do angels sing in the shower?