Answer:
I'm white and I'm used for cutting and grinding. When I'm damaged people usually remove me. What am I?
I get thrown in the air and will fall down. I get thrown down and I will rise in the air. What am I?
Flat as a leaf, round as a ring; have two eyes, can't see a thing. What am I?
Light hides me and darkness kills me. What am I?
I am the beginning of eternity the end of time and space the beginning of every end the end of every place.
The answer I give is yes, but what I mean is no. What was the question?