Answer:
Who spends the day at the window, goes to the table for meals. And hides at night?
An open ended barrel, it is shaped like a hive. It is filled with the flesh, and the flesh is alive.
It's equally comfortable in an orchestra and a geometry textbook. What is it?
In marble halls as white as milk, lined with a skin as soft as silk. Within a fountain crystal-clear. A golden apple doth appear. No doors there are to this stronghold, yet thieves break in and steal the gold.
I can be cracked, I can be made. I can be told, I can be played.
What is always coming but never arrives?