Answer:
It comes only before, it comes only after. Rises only in darkness, but rises only in light. It is always the same, but is yet always different.
When set loose I fly away. Never so cursed as when I go astray.
What can be heard and caught but never seen?
My first is nothing but a name; my second is more small; my whole is of so little fame it has no name at all.
What goes through a door but never goes in. And never comes out?
I’m grown from darkness but shine with a pale light. Very round I am and always a lady's delight.