Nope. Lots of stuff commonly believed by Christians isn’t from the Bible. (Though sometimes they’ll do a lot of mental gymnastics to assert that what they believe is from “the only reasonable interpretation” of the Bible.)
Just a few other things commonly believed by Christians not (or at least only dubiously) from the Bible:
- The seven deadly sins
- The nine circles of hell
- The seven levels of heaven
- Transubstantiation
- The trinity
That humans eventually become angels.
Though, there was one human who did, in an apocryphal book. And then was elevated yet again to being a second diety; there were apparently strains of Christianity which were DUOtheistic! https://en.wikipedia.org/wiki/Enoch
Want a rabbit hole of apocryphal knowledge, start digging into gnosticism. It’s like more internally consistent Christianity. Also depending on which flavor and particular interpretation, you could arrive at such truths as: Satan runs the church. God(old testament) is an asshole and a fool. Jesus (specifically the divine aspect Christ) is on a rescue mission to save God’s mom, Sophia, from the prison world that is earth, that God made specifically to trap her. Judas is a tragic hero who has to kill his friend, Jesus, so that Christ can escape the prison world.
It’s wild, it’s a more interesting story than Christianity, and I can ABSOLUTELY see why most of these books were branded heresy.
