James, Peter, John, nor Jude make any mention of Timothy in their letters, while virtually all of Paul's letters make mention of him (Romans, 1st and 2nd Corinthians, Philipians, Colossians, 1st and 2nd Thessalonians, 1st and 2nd Timothy, Philemon, and, of course, Hebrews).
It was pretty obvious Timothy was brought into the fold through Paul. The only other book in the New Testament that mentions Timothy is the Book of Acts, which references most integral people in the early church.
So... I would again suggest that Hebrews was indeed written by Paul.
The purpose of the fire is to bring forth the impurities within us so that they can be skimmed off. If what's happening around us is bringing out hatred, resentment, bitterness, turn from such wickedness in repentance and allow Jesus to skim the top of your smelt. Let it go when these things arise, you will be better for it. Trust me!