Thoughts on Revelation 13: "Because I said so"

Revelation 13 is somewhat upsetting.  It describes two beasts who God allows to roam the earth and do damage.  God even granted one of the beasts "ruling authority", with which he persecuted the saints.

I cannot give a reason for why God would let this happen.  I really don't know.  I do know that God does allow things like this.  After reading all of Job, I also know that God won't always give us a "good reason" for these things. Often, the only answer God gives us is something like we might have heard from our parents as young children, "Because I said so".  In those circumstances, we just have to take it and trust that God knows what He is doing.