Answer:
The more you take, the more you leave behind.
My sides are firmly laced about, Yet nothing is within; You'll think my head is strange indeed, Being nothing else but skin.
What's as small as a mouse but guards a house like a lion?
The strangest creature you'll ever find has two eyes in front and a hundred behind.
Two horses, swiftest traveling, harnessed in a pair, and grazing ever in places. Distant from them.
I’m grown from darkness but shine with a pale light. Very round I am and always a lady's delight.