Answer:
What is that which, though black itself, enlightens the world without burning?
The sharp slim blade, that cuts the wind. What is it?
It is a sound of empty, speak and it'll talk back plenty. But all the more you yack, you'll get the same words back.
A man shot two arrows at its center and missed both times, but using a sword swung once at its center and hit it twice.
What flies forever, Rests never?
When is it bad luck to see a black cat?