Answer:
The day is their night and the night is their day, when I shout and they shout back I run away.
It carries paper of the most important sort but also plastic, I'm glad to report. What is it?
Besides Paris, what is the capital of France?
What is always coming every day, but never arrives until the next?
I am not alive, though I never die, to no one I've ever told a lie, today I can be god's warrior, and serve him with no horror, but tomorrow I might be devil's knight, for I am what ends the light.
I always have to work with something in my eye. What am I?