Answer:
Although I'm not an insect, some people found me very difficult to exterminate. They called me something like 'insane priest.' The first half of my name means the same as 'scrape,' & my last three letters are a metal. Who am I?
What surrounds the world, yet dwells within a thimble?
I never was but always will be. No one ever saw me but everyone knows I exist. I give people the motivation to better themselves every day. What am I?
What is that which, though black itself, enlightens the world without burning?
What word is a plural, but when you add an "S" to the end, it becomes singular?
What sphinxes employ and players enjoy.