Revelation 5:4

John cried because he feared he would not learn about God's plan for history, even though it was promised to him (Revelation 4:1; see 10:4). His tears show how important the revelation was to him.

John introduces the Lamb, Jesus Christ, who is the main figure in Revelation and God's chosen one to fulfill his plans.

and to read--inserted in English Version Greek text without good authority. One oldest manuscript, ORIGEN, CYPRIAN, and HILARY omit the clause. "To read" would be awkward standing between "to open the book" and "to look thereon." John having been promised a revelation of "things which must be hereafter," weeps now at his earnest desire being apparently frustrated. He is a pattern to us to imitate, as an eager and teachable learner of the Apocalypse.

Hitherto the apostle had seen only the great God, the governor of all things, now,
I. He is favoured with a sight of the model and methods of his government, as they are all written down in a book which he holds in his hand; and this we are now to consider as shut up and sealed in the hand of God. Observe, 1. The designs and methods of divine Providence towards the church and the world are stated and fixed; they are resolved upon and agreed to, as that which is written in a book. The great design is laid, every part adjusted, all determined, and every thing passed into decree and made a matter of record. The original and first draught of this book is the book of God's decrees, laid up in his own cabinet, in his eternal mind: but there is a transcript of so much as was necessary to be known in the book of the scriptures in general, in the prophetical part of the scripture especially, and in this prophecy in particular. 2. God holds this book in his right hand, to declare the authority of the book, and his readiness and resolution to execute all the contents thereof, all the counsels and purposes therein recorded. 3. This book in the hand of God is shut up and sealed; it is known to none but himself, till he allows it to be opened. Known unto God, and to him alone, are all his works, from the beginning of the world; but it is his glory to conceal the matter as he pleases. The times and seasons, and their great events, he hath kept in his own hand and power. 4. It is sealed with seven seals. This tells us with what inscrutable secrecy the counsels of God are laid, how impenetrable by the eye and intellect of the creature; and also points us to seven several parts of this book of God's counsels. Each part seems to have its particular seal, and, when opened, discovers its proper events; these seven parts are not unsealed and opened at once, but successively, one scene of Providence introducing another, and explaining it, till the whole mystery of God's counsel and conduct be finished in the world.
II. He heard a proclamation made concerning this sealed book. 1. The crier was a strong angel; not that there are any weak ones among the angels in heaven, though there are many among the angels of the churches. This angel seems to come out, not only as a crier, but as a champion, with a challenge to any or all the creatures to try the strength of their wisdom in opening the counsels of God; and, as a champion, he cried with a loud voice, that every creature might hear. 2. The cry or challenge proclaimed was, "Who is worthy to open the book, and to loose the seals thereof? Rev 5:2. If there by any creature who thinks himself sufficient either to explain or execute the counsels of God, let him stand forth, and make the attempt." 3. None in heaven or earth could accept the challenge and undertake the task: none in heaven, none of the glorious holy angels, though before the throne of God, and the ministers of his providence; they with all their wisdom cannot dive into the decrees of God: none on earth, no man, the wisest or the best of men, none of the magicians and soothsayers, none of the prophets of God, any further than he reveals his mind to them: none under the earth, none of the fallen angels, none of the spirits of men departed, though they should return to our world, can open this book. Satan himself, with all his subtlety, cannot do it; the creatures cannot open it, nor look on it; they cannot read it. God only can do it.
III. He felt a great concern in himself about this matter: the apostle wept much; it was a great disappointment to him. By what he had seen in him who sat upon the throne, he was very desirous to see and know more of his mind and will: this desire, when not presently gratified, filled him with sorrow, and fetched many tears from his eyes. Here observe, 1. Those who have seen most of God in this world are most desirous to see more; and those who have seen his glory desire to know his will. 2. Good men may be too eager and to hasty to look into the mysteries of divine conduct. 3. Such desires, not presently answered, turn to grief and sorrow. Hope deferred makes the heart sick.
IV. The apostle was comforted and encouraged to hope this sealed book would yet be opened. Here observe, 1. Who it was that gave John the hint: One of the elders. God had revealed it to his church. If angels do not refuse to learn from the church, ministers should not disdain to do it. God can make his people to instruct and inform their teachers when he pleases. 2. Who it was that would do the thing - the Lord Jesus Christ, called the lion of the tribe of Judah, according to his human nature, alluding to Jacob's prophecy (Gen 49:10), and the root of David according to his divine nature, though a branch of David according to the flesh. He who is a middle person, God and man, and bears the office of Mediator between God and man, is fit and worthy to open and execute all the counsels of God towards men. And this he does in his mediatorial state and capacity, as the root of David and the offspring of Judah, and as the King and head of the Israel of God; and he will do it, to the consolation and joy of all his people.

I wept much - Because the world and the Church were likely to be deprived of the knowledge of the contents of the book.

And I wept much,.... Not so much on his own account, because he feared his curiosity would not be gratified, and that strong desire answered, which were raised in him upon sight of the book, and increased by the angel's proclamation; but for the sake of the church of God, whose representative he was, and to whom the knowledge of this book, and the things contained in it, he judged must be very useful and profitable. The Ethiopic version reads, "and many wept"; many of those that were about the throne, as well as John:

because no man was found worthy to open and to read the book,

neither to look thereon; because there was no creature in heaven, earth, or under it, that were of dignity and authority, as well as of ability, to open the book by unsealing it; and read and deliver out the prophecies in it upon the taking off of every seal; and so not to look into it, and foresee and foretell what was hereafter to come to pass, in the church and world: the phrase of being worthy to look on it seems to be Jewish; of the book of the generation of Adam, Genesis 5:1, the Jews say (e) that

"it descended to the first man, and by it he knew the wisdom which is above; and this book came to the sons of God, the wise men of the age, , "whoever is worthy to look in it", knows by it the wisdom which is from above.''

The whole verse is left out in the Alexandrian copy; and the phrase, "to read", is neither in the Vulgate Latin, nor in any of the Oriental versions.

(e) Zohar in Gen. fol. 28. 2.

As it is the nature of man to desire to know secret and hidden things, especially such as we apprehend of concernment to ourselves, or those whom we love, or are interested in it; and to be troubled, if we know they may be known, and are at a loss for due means whereby to come to the knowledge of them.