Answer:
My sides are firmly laced about, Yet nothing is withinอพ You'll think my head is strange indeed, Being nothing else but skin.
It's in your hand though you can not feel it. Only you and time can reveal it.
You throw me out when you want to use me and you take me in when you don't want to use me. Who am I?
What is so fragile that saying its name breaks it?
What is that which, though black itself, enlightens the world without burning?
Iโm grown from darkness but shine with a pale light. Very round I am and always a lady's delight.