I find it funny the difference between enlightenment from one belief is to another. The Greeks myth of Prometheus and the Flame of the Gods is very similar to Lucifer and the Forbidden Fruit. Seeing as how the Greek god of Zeus and Christianity/Catholics have a god of similar shape... The Romans tool the idea of Zeus and Greek mythology to add to theirs, naming him Jupiter. Catholic religion seems to have sprouted their ideas of similar taste from the Roman's existing belief later on. Curious to note, how Prometheus and the Flame was a good thing for man, while lucifer and the forbidden fruit is seen as a bad thing. I find that to be rather funny.
Religion is there to create stability, to make sure that ideas and order of a certain ordeal live on for civilizations... It does not make them good or evil. As you said, religion changes, and beliefs change. The views of Catholics and christians have changed drastically from before to now. If such change occurs, and such lines and subjective content within such religions change... Does it not show irrelevance? That a belief is no absolute, that it can change with the people, and thus they can be removed. Contrary to what many may think now, Jesus might one day die from being a highly seen person, as well as Mohammed, Buddha, and other things... Just as other religions before have died.
Time and change have a funny way of shifting things. As religion shows for proof of relative and absolute, one wonders how long these things will exist before being replaced by a new belief. One can say that the aspect of science, the new religion and belief of now, is doing it as we speak.