Most people accept that 2 + 2 = 4 is true. But this is only accurate within the math realm, which is a purely abstract concept. There's no such thing as "2" in the physical world.
I view most religions in a similar way, they are a form of truth, that exist within their abstract realm.
I read a fantasy novel once that had a character that believed in religion. All of them. At the same time. Sincerely.
I always admired him.