Answer:
Always wax, yet always wane: I melt, succumbed to the flame. Lighting darkness, with fate unblest, I soon devolve to shapeless mess.
At night I come without being fetched. By day I am lost without being stolen.
If you're stealing honey, be prepared to receive vengeance in this form.
What stays the same size no matter how much they weight?
Halo of water, tongue of wood. Skin of stone, long I've stood. My fingers short reach to the sky. Inside my heart men live and die.
Almost everyone needs it, asks for it, gives it. But almost nobody takes it.