Answer:
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.
Many foods can make me strong but give me water and I won't last long.
Useful term for when you need to start a fire or notice someone with the same shirt as you.
A
In many hallways you would stand, if not with this in hand.
What do you purposefully put lots of in and on your body, but run away from when you encounter it outside?