Answer:
I go inside boots and outside shoes.
Break me and I am better immediately set and harder to be broken again.
I may only be given but never bought. Sinners seek me but saints do not. (one word).
What has 4 fingers and a thumb but is not living?
Fatherless and motherless. I was born without sin. Roared when I came into the world, but I never spoke again. What am I?
It has no top or bottom, but it can hold flesh, bones, and blood all at the same time.