Then I start reading threads here and most of you guys just blew me out of the water. Have to say some things are just wild and/or assume/read too much into small details, however it's great fun and there's also true insight in many posts.
Now for my post:
Lots of people have theories about the hero's quest but I don't belive I've seen many if any pointing to a certain religious motif in there.
For me linking the fire seems about humanity placing their fate in the hands of an higher power AKA the lords AKA the age of fire.
The dark lord and the pigmy seems about humanity standing or their own tiny feet without any hand holding. The dark part is maybe the fact we have to sin/make mistakes and learn on our own. After all "it is only human to commit a sin". The dark lord meaning humanity is now (real life) more than ever distancing itself from the old beliefs due to our technological/intelectual development. Seems the ending is saying we are our own masters, flawed or not.
Sacrificing "humanity" to kindle fires (fires meaning faith or belief maybe) can very well point to atrocious acts in the name of god AKA the inquisition. Why is that firekeeper forbidden from talking? In Portugal we had a similar thing with Lucy, the woman who supposedly witnessed the "miracle" of the virgin mary, and was then locked way for life.
Then there are the serpents who act as advisors and other details.
In the end there might be many things that go against this theory since the story may lend itself to many interpretations, like the dragons, who according to catolicism usually represent the devil. In dark souls they seem to represent nature or/and the hardships it presented humanity with in the very beggining of the world. What do you think?