The power that resides in the Word, is the power that spoke the creations into existence, and can keep them in their appointed places.
By the Word of Yahweh were the Heavens made; and all the host of them by the breath of his mouth. He gathereth the waters of the sea together as a heap: he layeth up the depth in storehouses. Let all the Earth fear Yahweh: let all the inhabitants of the world stand in awe of him. For he spake, and it was done; he commanded, and it stood fast.
Let us make one assertion, God will honour His Word. With this conclusion, neither the New Testament nor the Old Testament supersede each other. Instead, we see a mirror reflection in the physical books.
The Word that became Flesh, is Gods word and the books merely bring knowlegde of The Word.
And I saw heaven opened, and behold a white horse; and he that sat upon him was called Faithful and True, and in righteousness he doth judge and make war. His eyes were as a flame of fire, and on his head were many crowns; and he had a name written, that no man knew, but he himself. And he was clothed with a vesture dipped in blood: and his name is called The Word of God. (Rev 19:11-13)
The word of God is not a bible book. The Word of God IS Yeshua!