Why is the Bible considered the word of God almost universally among other Christians?

Where in the Bible does it say that the Bible is the word of God? Where did this notion come from?

It contains the word of God. But it’s very clearly written by 3rd parties. And isn’t even always about God. There’s a whole book in the Bible about fucking. In fact most books are named after their writers- none of them God.

I had to ditch these silly notions like the “WoRd Of GoD” and see the Bible for what it is- Ancient Hebrew history and prophecy- to come back to Jesus.

Why is the Bible considered the word of God almost universally among other Christians?
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