Revelation 5:2 Revelation 5:2 And I saw a strong angel, proclaiming with a loud voice, who is worthy to open the book, and to loose the seals thereof? This strong angel was one of the holy angels of God, who are his ministering spirits. \ Haply that ministering angel, by whom Jesus Christ sent and signified these things unto his servant John, see Revelation 1:1. Called a strong angel, to signify the mighty power which God hath given to his holy angels to do his will, \ proclaiming with a loud voice The voice of an angel of God is so loud, as can make all the dead that are in the grave hear, \ Who is worthy to open the book, and to loose the seals thereof?