"Christians can’t use ‘circular reasoning’ by trying to prove the Bible by quoting from the Bible!"

The "circular reasoning" argument is absurd. That’s like saying you can’t prove that the President lives in the White House by looking into the White House. It is looking into the White House that will provide the necessary proof. The fulfilled prophecies, the amazing consistency, and the many scientific statements of the Bible prove it to be the Word of God. They provide evidence that it is supernatural in origin. See also Psalm 119:105 footnote.