Answer:
The more of this there is the less you see. What is it?
I go through a door but never go in and never come out.
I open to close but I close to open. I'm surrounded by water but I'm never soaking. What am I?
Never ahead, ever behind, yet flying swiftly past, for a child, I last forever, for adults, I'm gone too fast.
I don't have eyes, but once I did see. Once I had thoughts, but now I'm white and empty. What am I?
I touch the Earth, I touch the sky, but if I touch you, you’ll likely die. What am I?