Answer:
I'm the start of eternity and the end of space. There are two of me in heaven and one in hell.
I am neither a guest nor a trespasser in this place. I belong that belongs to me. Where is it?
If it is absolute, it will corrupt absolutely.
Every country has one, though we are not the same. Waving to our citizens, throughout the wind and rain. What is it?
Very helpful if you intend to go gently down a river.
What never gets any wetter no matter how hard it rains?