[Wyrd bið ful aræd]

Every question you just asked can also be applied, without revision, to the scriptures.

Sources please.

[metmom]

Not so. We have ancient Greek and Hebrew manuscripts to use for translation purposes.

Word of mouth is inherently and notoriously unreliable.

There is no valid comparison between using almost 2,000 year old manuscripts and claiming that something has been passed down faithfully by word of mouth for almost 2,000 years.