By the decree — i.e., the message to the king rests on this decree or sentence, and it is ascribed to the “watcher,” because to him pertained the execution of the decree.
The demand. — Comp. Isaiah 44:26. According to the use of the word in Chaldee elsewhere, this can be the only true meaning. The “holy one” makes this request of God, and the carrying out of His decree pertains to the “watcher.” “This,” says Dr. Pusey, “gives another glimpse into the interest of the holy angels in ourselves. They, too, longed that oppression should cease, and joining in the cry which for ever is going up from the oppressed to the throne of mercy and judgment, prayed for that chastisement which was to relieve the oppressed and convert the oppressor” (Lectures on Daniel, p. 525).
Ruleth... — i.e., Almighty God disposes of human empires as He pleases. (Comp. Daniel 5:21.)