Have you ever noticed the transition of the Word of God to God Himself in the 4th chapter of Hebrews? Notice the 12th and 13th verses:
"For the word of God is quick and powerful, and sharper than any two-edged sword, piercing even to the dividing asunder of soul and spirit, and of the joints and marrow, and is a discerner of the thoughts and intents of the heart. Neither is there any creature that is not manifest in His sight: but all things are naked and opened unto the eyes of Him with whom we have to do."
It is the living Word of God that reaches down into the conscience of men. There is nothing like it! It penetrates and judges all before it. It carries its own credentials. Men may seek to defend the Word of God, but their puny efforts are not needed. It has stood all the assaults of generations and remains the same living and operative Word of God as before. It has power to touch the inner being of a man today as much as it had a thousand years ago. It is sharp—it cuts. How do you know it? Sit down quietly and read it, allowing it to do its work, and you will find out.
If a man were to cut you with a knife, would you need any proof that the knife would cut? No, you would have it. Just so, the Word of God proves itself and brings a person consciously into God's presence, for behind the Word of God is God. He is the One with whom we have to do. No human being can escape having to do with the living God. How good it is then to have His Word search us and by its action bring us before Him.