You may rightly question whether it is logically sound to refer to the bible to justify whether the bible is to be used as the ultimate source of authority for belief.

It cannot be justified in that way at the start of your journey.

But as you read the bible, and are given understanding and insight that no other source can give, you may come to accept these verses about the authority of the bible as confirming this approach.

All Scripture is given by inspiration of God

We do not speak in words taught by human wisdom, but in words taught by the Spirit.

For I testify to everyone who hears the words of the prophecy of this book: If anyone adds to these things, God will add to him the plagues that are written in this book; and if anyone takes away from the words of the book of this prophecy, God shall take away his part from the Book of Life, from the holy city, and from the things which are written in this book.

You shall not add to the word which I command you, nor take from it, that you may keep the commandments of the Lord your God, which I command you.

Your word is a lamp to my feet And a light to my path.

Sanctify them by Your truth.  Your word is truth.

Consider the possibilities:

(i) Any group will want to justify the basis for their beliefs, so we may choose to be cautious with these claims;

(ii) But consider the possibility that our world, and your life, is not a random accident of matter, but is the creation of a perfectly good and almighty being, whose nature is beyond our imagination.  Would not the creator want to reveal himself and guide us, using methods appropriate in ancient times, but with a message that is timeless?

“Men and brethren, this Scripture had to be fulfilled, which the Holy Spirit spoke before by the mouth of David …”

“Lord, You are God, …, who by the mouth of Your servant David have said: …”

“The Holy Spirit spoke rightly through Isaiah the prophet to our fathers, saying, …”

(concerning the Jews), “to them were committed the oracles of God.”

But the Holy Spirit also witnesses to us; . . . (quote from Jeremiah 31:33)

when you received the word of God which you heard from us, you welcomed it not as the word of men, but as it is in truth, the word of God,

for prophecy never came by the will of man, but holy men of God spoke as they were moved by the Holy Spirit.

Man shall not live by bread alone, but by every word that proceeds from the mouth of God

these are written that you may believe that Jesus is the Christ, the Son of God, and that believing you may have life in His name.

the word of God . . . which also effectively works in you who believe.

that the man of God may be complete, thoroughly equipped for every good work.