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.

The book was written on within and without.  There was no room for anything to be added.

Was probably actually a scroll.

Much like Ezekiel's book (Eze. 2:10).

"Seven seals" indicates that it was perfectly secure.  No one could see the content until the
appointed time.

The seals show that it was originally purposed in the mind of God and was to be revealed to man
later.

It seems that this book symbolized God's eternal plan for the salvation of man.

God's plan was originally a mystery to man (Eph. 1:9-10).

And I saw a strong angel proclaiming with a loud voice, Who is worthy to open the book, and
to loose the seals thereof?3 And no man in heaven, nor in earth, neither under the earth, was
able to open the book, neither to look thereon.

No one in all of creation was able to open the book.

4 And I wept much, because no man was found worthy to open and to read the book, neither
to look thereon.5 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.

None of creation could open the book, but he creator could.

"Lion of the tribe of Judah..." (Gen. 49:9-10; Heb. 7:14).

Root of David (2 Sam. 7:11-14.

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.

The lamb represents the sacrificial aspect of Christ.

He was able to open the seals not by His power but by His sacrificial love.

"Horn" is used in Hebrew to represent power (Deut. 33:17; 1 Sam. 2:10).

"Seven horns" represents the perfection of Christ's power (Mt. 28:18).

"Seven eyes" represents full or perfect knowledge.

7 And he came and took the book out of the right hand of him that sat upon the throne.

This event had actually taken place at Christ's ascension.  Paul is just seeing it acted out.

8 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.

Harps are representative of praise.

"vials full of odours, which are the prayers of the saints..."  (Rev. 8:3-4; Psa. 141:2).

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;10 And hast made us unto our God kings and priests: and
we shall reign on the earth.

Verse 10: "And madest them to be unto our God a kingdom and priests; and they reign upon the
earth" (ASV).

Christ purchased us and made us into a kingdom and priest (1 Pet. 1:19; 2:5, 9).

Hebrews 13:15-16.

11 And I beheld, and I heard the voice of many angels round about the throne and the beasts
and the elders: and the number of them was ten thousand times ten thousand, and thousands
of thousands;

Literally; "myriads of myriads, and thousands of thousands."

An uncountably large number.

12 Saying with a loud voice, Worthy is the Lamb that was slain to receive power, and riches,
and wisdom, and strength, and honour, and glory, and blessing.13 And every creature which is
in heaven, and on the earth, and under the earth, and such as are in the sea, and all that are
in them, heard I saying, Blessing, and honour, and glory, and power, be unto him that sitteth
upon the throne, and unto the Lamb for ever and ever.14 And the four beasts said, Amen. And
the four and twenty elders fell down and worshipped him that liveth for ever and ever.

The angels desired to look into God's scheme of redemption also (Eph. 3:10; 1 Pet. 1:12).

"Power" infinite or divine power, power to rule equal to that of God.

"Riches" wealth or abundance; (Eph. 3:8; Jn. 10:10).

"Wisdom" insight into the true nature of things (Col. 2:3).

"Might" strength.  The attribute by which power is put into action.

"Honour" high respect out of the value placed upon one, merit, preciousness.

"Glory" brightness, splendor radiance.

"Blessing" praise.

Psalm 148; the whole creation is called to praise God.