I think it is obvious that there are those that believe religion is an authoritative revealed type of thing, and those that think religion is an open exploration, seeking, or personal journey type of thing. Is this dichotomy incorrect?
Very good observation, and I agree. To give some actual terms for this you are describing the difference between
exoteric religion and
esoteric religion. Exoteric is something outside of yourself. It's the forms, the rites, the rituals, the beliefs, the symbols, etc that one engages with that defines their religion life and identity. God is "outside" of them, in other words. Esoteric religion on the other hand is an internal exploration. It is seeking to know God within, to unite one's soul with the divine. Exoteric religion is about conformity, whereas esoteric religion is about transformation
Where do you (religious folk) fall?
Squarely on the esoteric side of things.
Is religion something that evolves, or is it written in stone?
As far as exoteric religion evolving, yes of course it does, but it does tend to seek for stability. Exoteric religion functions as a support structure. It has function to help translate the world within one's society and culture. Just as culture evolves, so does its institutions to help support it, Religion of course functions this way in one's society and it's obvious religion's have in fact evolved, even those claiming to be fundamentalist religions. It's unavoidable.
As for escotic religion, well, evolution is the name of the game! It functions vertically, moving one upward from the lower to the higher. It is all about becoming self-realized. So technically it doesn't itself evolve because is is evolution itself in a sense. But it evolves the individual in radical ways.