The Bible is the Word of God and the optative word here is the word “is.” To say or suggest that the Bible merely contains the Word of God would mean that one would have to be a detective to search and find what is and what is not actually God’s Word in the Bible. Because the Bible is the Word of God, we can be sure that it is true and authoritative.
The Bible is the Word of God which is always true. This fact may be compared to the word of any human being which has been tainted by sin and which may or may not be true. Thus, when there is a question as to whether to believe the word of a human, even a smart human over against believing the Word of God, it is best to believe the Word of God and to understand that the human has gotten something wrong.
This distinction between God’s Word and man’s word is especially important in any of the fields of science as well as in understanding, translating and interpreting God’s Word. When science disagrees with the Bible, it is always best to believe that scientist have made an error in their findings. When it is suggested that the Word of God may be interpreted in different ways, or that God contradicts Himself, the problem is not with God’s Word, but with the findings of fallible humans.
The point is that the Word of God is the foundation for all truth, indeed as Jesus tells us, “Jesus said to him, ‘I am the way, and the truth, and the life. No one comes to the Father except through me’” (John 14:6). Apart from Jesus there is and can be no truth as we see in the world which suggests there is no god and there are no absolutes.
The Word of God is also the source of all authority. If God said it then that settles it, whether we understanding it or agree with it. If God says it in His Word, we know it is trustworthy and true and that it is authoritative. Indeed, the Bible is God’s Word and we believe it and live according to it as such.