Then shalt thou understand the fear of the LORD, and find the knowledge of God. For the LORD giveth wisdom: out of his mouth cometh knowledge and understanding. He layeth up sound wisdom for the righteous: he is a buckler to them that walk uprightly, PRO 2:5-7.

When the Lord Jesus Christ "opened His mouth" (MAT 5:2) to preach the Sermon on the Mount, truths that had been sealed since the beginning of the world began to come forward. "I will utter things which have been kept secret from the foundation of the world," MAT 13: 35b. Notice what it says in REV 5:1, "And I saw in the right hand of him that sat on the throne a book written within and on the backside, sealed with seven seals."

Forty is the symbol of fullness and completeness all the way through Scriptures. "And Jonah began to enter into the city a day’s journey, and he cried, and said, Yet forty days, and Nineveh shall be overthrown." Matthew is the fortieth Book of the Bible. It was the opening of that seal. The first thirty-nine books of the Bible were yet sealed.

There were most precious truths in the first thirty-nine books, but the Lord had to open their understanding. The Lord "opened His mouth," and see what happened. "And I saw in the right hand of him that sat on the throne a book written within and on the backside, sealed with seven seals," REV 5:1.

When the Lord Jesus Christ opened His mouth, those seals were broken. Those precious truths that had been sealed from eternity were set forth by His gospel.

Let's read on. "And I saw a strong angel proclaiming with a loud voice, Who is worthy to open the book, and to loose the seals thereof?" Who was worthy? The prophets weren’t. Not one, including Daniel and Abraham, was worthy. The world had to wait the time of the Lord Jesus sitting on that Mount.

"And no man in heaven, nor in earth, neither under the earth, was able to open the book, neither to look thereon. And I wept much, because no man was found worthy to open and to read the book, neither to look thereon. And one of the elders saith unto me, Weep not: behold, the Lion of the tribe of Juda, the Root of David, hath prevailed to open the book, and to loose the seven seals thereof," REV 5:3-5.

When Jesus opened His mouth and began to bring forth the gospel, He began to open those seals. That is so precious, so blessed!

Watch and see His qualification. It was the Lamb that was slain. Look at V:6, "And I beheld, and, lo, in the midst of the throne and of the four beasts, and in the midst of the elders, stood a Lamb as it had been slain, having seven horns and seven eyes, which are the seven Spirits of God sent forth into all the earth." Seven is the symbol of perfection. "...seven horns and seven eyes, which are the seven Spirits of God sent forth into all the earth."

That is what went forth when He opened His mouth. These are such unspeakable riches! Look at verse 7, "And he came and took the book out of the right hand of him that sat upon the throne." O beloved, heaven was so joyous over the opening of the Book of knowledge. Think of what was opened when "he opened his mouth, and taught them," MAT 5:2.

REV 5:8 says, "And when he had taken the book, the four beasts and four and twenty elders fell down before the Lamb, having every one of them harps, and golden vials full of odours, which are the prayers of saints." Look at the wisdom and the glory in verse 9. "And they sung a new song, saying, Thou art worthy to take the book, and to open the seals thereof: for thou wast slain, and hast redeemed us to God by thy blood out of every kindred, and tongue, and people, and nation."