Why should we believe even a single word in the Bible?

Jesus quoted only the Old testament (the Septuagint version with the Deuterocanonical books, BTW).

If only there were some authority on Earth, empowered to decide what is - and what is not - Holy Scripture. That authority would need to be explicitly empowered by Jesus and could definitively interpret it when necessary.

Alternatively, we could just take the opinions of a couple men from the 1500s then further interpret that to be pretty much whatever we want.

The Bee has a humorous take (they're Protestant; the irony seems to escape them):

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