We know the Bible is the word of God because it says so.
1.We do not use logic and evidence to prove that the Bible is God's word. otherwise, the Bible is subject to logic and evidence. It is sufficient that God's word testifies of itself.
2. This will not convince unbelievers, but the redeemed know the Bible is the word of God because Holy Spirit who lives in us bears witness to this truth.
3. We are enabled to know the truth of God's word because of the cross of Christ that brings us to a saving relationship with God who then lives in our hearts and reveals truth to us.
4. Christians know and trust God's word because they hear and know the voice of Jesus.