Luke 24:27 And beginning at Moses and all the prophets, he expounded unto them in all the Scriptures the things concerning himself.

If it isn't, then why did Christ refer to it so often?

What convinces me that it is the Word of God, also known as the Scriptures, is the information contained in it, both historical and prophetical, as well as the promises and other instructional information.

John 1

1In the beginning was the Word, and the Word was with God, and the Word was God.

2The same was in the beginning with God.

3All things were made by him; and without him was not any thing made that was made.

4In him was life; and the life was the light of men.

5And the light shineth in darkness; and the darkness comprehended it not.

6There was a man sent from God, whose name was John.

7The same came for a witness, to bear witness of the Light, that all men through him might believe.

8He was not that Light, but was sent to bear witness of that Light.

9That was the true Light, which lighteth every man that cometh into the world.

10He was in the world, and the world was made by him, and the world knew him not.

11He came unto his own, and his own received him not.

12But as many as received him, to them gave he power to become the sons of God, even to them that believe on his name:

13Which were born, not of blood, nor of the will of the flesh, nor of the will of man, but of God.

14And the Word was made flesh, and dwelt among us, (and we beheld his glory, the glory as of the only begotten of the Father,) full of grace and truth.

15John bare witness of him, and cried, saying, This was he of whom I spake, He that cometh after me is preferred before me: for he was before me.

16And of his fulness have all we received, and grace for grace.

17For the law was given by Moses, but grace and truth came by Jesus Christ.

18No man hath seen God at any time, the only begotten Son, which is in the bosom of the Father, he hath declared him.

19And this is the record of John, when the Jews sent priests and Levites from Jerusalem to ask him, Who art thou?

20And he confessed, and denied not; but confessed, I am not the Christ.

21And they asked him, What then? Art thou Elias? And he saith, I am not. Art thou that prophet? And he answered, No.

22Then said they unto him, Who art thou? that we may give an answer to them that sent us. What sayest thou of thyself?

23He said, I am the voice of one crying in the wilderness, Make straight the way of the Lord, as said the prophet Esaias.

24And they which were sent were of the Pharisees.

25And they asked him, and said unto him, Why baptizest thou then, if thou be not that Christ, nor Elias, neither that prophet?

26John answered them, saying, I baptize with water: but there standeth one among you, whom ye know not;

27He it is, who coming after me is preferred before me, whose shoe's latchet I am not worthy to unloose.

28These things were done in Bethabara beyond Jordan, where John was baptizing.

29The next day John seeth Jesus coming unto him, and saith, Behold the Lamb of God, which taketh away the sin of the world.

30This is he of whom I said, After me cometh a man which is preferred before me: for he was before me.

31And I knew him not: but that he should be made manifest to Israel, therefore am I come baptizing with water.

32And John bare record, saying, I saw the Spirit descending from heaven like a dove, and it abode upon him.

33And I knew him not: but he that sent me to baptize with water, the same said unto me, Upon whom thou shalt see the Spirit descending, and remaining on him, the same is he which baptizeth with the Holy Ghost.

34And I saw, and bare record that this is the Son of God.

35Again the next day after John stood, and two of his disciples;

36And looking upon Jesus as he walked, he saith, Behold the Lamb of God!

1 John 1

1That which was from the beginning, which we have heard, which we have seen with our eyes, which we have looked upon, and our hands have handled, of the Word of life;

2(For the life was manifested, and we have seen it, and bear witness, and shew unto you that eternal life, which was with the Father, and was manifested unto us;)

3That which we have seen and heard declare we unto you, that ye also may have fellowship with us: and truly our fellowship is with the Father, and with his Son Jesus Christ.

4And these things write we unto you, that your joy may be full.

5This then is the message which we have heard of him, and declare unto you, that God is light, and in him is no darkness at all.

6If we say that we have fellowship with him, and walk in darkness, we lie, and do not the truth:

7But if we walk in the light, as he is in the light, we have fellowship one with another, and the blood of Jesus Christ his Son cleanseth us from all sin.

26And they came unto John, and said unto him, Rabbi, he that was with thee beyond Jordan, to whom thou barest witness, behold, the same baptizeth, and all men come to him.

27John answered and said, A man can receive nothing, except it be given him from heaven.

28Ye yourselves bear me witness, that I said, I am not the Christ, but that I am sent before him.

29He that hath the bride is the bridegroom: but the friend of the bridegroom, which standeth and heareth him, rejoiceth greatly because of the bridegroom's voice: this my joy therefore is fulfilled.

30He must increase, but I must decrease.

31He that cometh from above is above all: he that is of the earth is earthly, and speaketh of the earth: he that cometh from heaven is above all.

32And what he hath seen and heard, that he testifieth; and no man receiveth his testimony.

33He that hath received his testimony hath set to his seal that God is true.

34For he whom God hath sent speaketh the words of God: for God giveth not the Spirit by measure unto him.

35The Father loveth the Son, and hath given all things into his hand.

36He that believeth on the Son hath everlasting life: and he that believeth not the Son shall not see life; but the wrath of God abideth on him.

Thus through faith they come to know God by an experimental knowledge. They have proved for themselves the reality of His word, the truth of His promises. They have tasted, and they know that the Lord is good. {MH 461.1}

The beloved John had a knowledge gained through his own experience. He could testify: {MH 461.2}

"That which was from the beginning, which we have heard, which we have seen with our eyes, which we have looked upon, and our hands have handled, of the Word of life; (for the life was manifested, and we have seen it, and bear witness, and show unto you that eternal life, which was with the Father, and was manifested unto us;) that which we have seen and heard declare we unto you, that ye also may have fellowship with us: and truly our fellowship is with the Father, and with His Son Jesus Christ." 1 John 1:1-3. {MH 461.3}

So everyone may be able, through his own experience, to "set his seal to this, that God is true." John 3:33, A.R.V. He can bear witness to that which he himself has seen and heard and felt of the power of Christ. He can testify: {MH 461.4}

"I needed help, and I found it in Jesus. Every want was supplied, the hunger of my soul was satisfied; the Bible is to me the revelation of Christ. I believe in Jesus because He is to me a divine Saviour. I believe the Bible because I have found it to be the voice of God to my soul." {MH 461.5}

Let us first note that this term "Word of God" in reference to the Bible did not come into vogue until the time of Constantine, if my research serves me right. The Word of God constitutes all the manifestations, utterances, revelations and deeds of the Creator of the Universe. It can certainly be found in the Bible but it is not restricted nor fully manifested in the Bible.