Answer:
What invention lets you look right through a wall?
As a state in America I am round on both sides and high in the middle.
I may only be given but never bought. Sinners seek me but saints do not. (one word).
I canโt go left I canโt go right. I am forever stuck in a building over three stories high.
The more you look at me The less you see.
How can you throw a ball as hard as you can, to only have it come back to you, even if it doesnโt bounce off anything?