She has a foundation. It's just not from the bible.Her foundation, of course, has lots to do with the golden rule--but she thinks that's a good path to follow without much concern for hell, Paul's Letters, Revelations, Moses, etc.
If she chooses a religion one day, that will be hers to decide. I grew up at the edges of one and never felt a need to dive in. These days, I'm spiritually closest to secular Buddhist. My wife was devout Presby and largely isn't now. My daughter will find her own spiritual path.
She's 16. I guide her now. I guided her when she was 4. And I'll guide her as I lay dying. But she's largely starting to steer her own ship.