Answer:
At first, I am nothing. Add something to negate. Add again to oppose. Add again to find the time to draw. Add once more to find nobody at all.
This is needed both for courage and hardcover books.
You must keep this thing. Its loss will affect your brothers. For once yours is lost, it will soon be lost by others.
I have a neck but no head. I have a body but no arm. I have a bottom but no leg.
Only one color, but not one size. Stuck at the bottom, yet easily flies. Present in sun, but not in rain. Doing no harm, and feeling no pain.
Brings the sky a lot closer.