Penso, if I may ask (or if you feel like sharing), what do you teach and where do you teach it?
I teach at Brooklyn College in the department of Classics; my Ph.D. is Greek from the University of St. Andrews; I teach mostly Ancient Greek and Greek and Roman Lit.
Let me also say that the book of Hebrews is something of a mystery, in that it was for centuries attributed to the apostle Paul, even though I don't believe Paul wrote it.
True dat about the authorship; I assumed you were toeing the company line. And you're right, the Greek is far too good for Paul, and so is the logic.
However, I would also add that my faith doesn't hang on one passage of scripture. There are many debated passages like this one, but I still find the whole of scripture to reveal valuable truth.
And please don't take it that I'm trying to dissuade you from your faith, or that I think there aren't good things that come from the practice of genuine faith and, as you have said, practice.