There are several holy books in the world. The Bible is one of them. Why should I believe the Bible and none of the others, for example those that are far older than the Bible?

Now we are approaching a subject which evades sensible deduction and argumentation. Christians cannot use sense to prove to those in doubt that the Bible alone is the Word of God unlike all the other books that claim this title. We have not compared all the old book collections and, after much consideration, chosen one of them, like when buying a new phone. Old Lutheran teachers expressed this in sharp words. It is a characteristic of the Bible that it convinces its reader that it is, indeed, the Word of God. In this way, the authority of the Bible does not lean on the decisions made by the Church, on sensible arguments or latest research. It leans on nothing but the greatness and strength of God.

This is exactly why a reader of the Bible can still be convinced that God is speaking to him or her. Another reader might not share this experience. According to our faith, this shows that the light of God does not reach everyone’s heart.

Where is the one who is wise? Where is the scribe? Where is the debater of this age? Has not God made foolish the wisdom of the world? For since, in the wisdom of God, the world did not know God through wisdom, it pleased God through the folly of what we preach to save those who believe.
(1 Corinthians 1:20-21 ESV)