I think Bible was meant as a more general term in the past, but was adopted by Christianity over the years to be the name of the main book. According to Google:
Middle English: via Old French from ecclesiastical Latin biblia, from Greek biblia ‘books,’ from biblion ‘book,’ originally a diminutive of biblos ‘papyrus, scroll,’ of Semitic origin.
I mean, think of the term "bibliophile." It simply means that you love books. I've met people who think it's a religious term, but it's not. It simply means you love reading.
But anyway, I wanted to comment on Sonic's character in SatAM. I always liked him since I was a kid. I have a soft spot for the snarky, sarcastic hero who trash talks the villain (ie Spider-Man, etc) Did he sometimes act egotistical? Was he sometimes rude? Yes, but think of this as just part of the hero's journey. One of my favorite aspects of a story is reading/watching a character change and adapt to the events around them, and I feel Sonic does do this. His ego slowly tones down over the course of the show, and he becomes more responsible and competent.
One thing about Sonic is that he usually owns up to his mistakes, especially the big ones, and with each one he learns a lesson. One in particular is trying to save Uncle Chuck. He apologizes to Sally for acting so rash, and even eventually takes on a (somewhat) more responsible role where Uncle Chuck was concerned. Sonic worries about Chuck being a spy, and tries to lecture him into giving up the spy gig to come back to safety. It was an interesting twist. You'd think Sonic would be the one who was all in favor of being an undercover spy in Robotropolis, but he actually disapproves of Chuck doing this. All part of growing as a character.
Not to mention I always loved his interactions with Tails. He takes on an older-brother role and for the most part is very responsible when Tails is in his care, even taking him on training missions to help him grow as a Freedom Fighter.
I have no doubt we would have seen Sonic progress further had season 3 been allowed to happen. For me, as long as I know the story doesn't think the hero being in the wrong is okay, I can deal with it, because I know there will be payoff in the character development.
Makes me even sadder that the show was cancelled before we got a season 3.