It is a word of God to you because you choose it to be that. Others choose to believe the Koran, and others yet other writings. You and others have no proof that it is a word of God, except you and they believe it. Keep it that way. I have no quarrel with that, but don't make what you believe a matter-of-fact statement unless you can prove it.
I am sorry to see you say this my FRiend.
There is abundant proof that the Scriptures are the Word of God if you wish to look at it objectively. Jesus proved he is the Son of God by his resurrection which was witnessed by hundreds. His words when written down would be the Word of God.
The fulfillment of OT prophecy in the NT is another measure of the inspired writings. There is no way so many different writers could accurately predict future events that occurred hundreds of years later if they were not being directed by God.
Finally, the ability to perform miracles during the Apostolic Era was evidence of the Holy Spirit guiding these individuals and their close relationship to Jesus Christ, or Apostles called out by Jesus, adds to the veracity of their writings being "GOD BREATHED".