Let us set aside for a moment the historical evidence that the Bible is a work of man. It’s been translated, re-translated, cobbled together from numerous sources – contains contradictions, and is hardly a pillar of moral rectitude (being that it condones slavery, genocide and incest).
There are, nonetheless, a number of people who feel that it is the inerrant word of God.
The problem with this position is that it is strictly hearsay. You believe it is the word of God only because you have been told it is.
Yes, in the Bible it says it is the word of God. But simply because it is written in the book, does not make it true (unless you start out assuming that the Bible is the word of God, but then you are begging the question).
And many people from other religions have read that line and are not convinced. So why do you believe?
It’s because someone told you that this was the word of God. In fact, likely you would never have read the book but for someone telling you first. It is not as if you were summing through books in the library and stumbled across the Bible, and then read it only to discover it is the work of the one true God. Someone had to tell you.
Well, how did that person know? It can really only be the same way. Someone told them. And someone told that person, and that person, and so on. It’s hearsay upon hearsay upon hearsay, hoping all the time nobody’s embellished anything, not even a little. You’ve played telephone. How did that work out for you?
Indeed, even if the gospels were written by their “authors” (which there’s no reason to believe and some reason to doubt) much of the written stories are all second hand accounts.