Billy Graham in his best seller wrote of ten ranks of angels. Such rankings of angels are pure speculation. While Scripture mentions the nine classes of angels noted by St. Ambrose, it reveals nothing to us about the arrangement of their orders or what are their spheres of influence, other than the archangels are princes and rulers among the angels. Television programs have made much of these speculations. We should be aware and beware of them.
Scripture is our only valid source of information about angels.
The Bible provides a wealth of information about the angels, much more than we could hope to cover in this short study. Here we can barely scratch the surface of the biblical information provided. Our gracious Savior God had the Scriptures written to teach us the gospel of Jesus Christ for our salvation, not to provide us with a text book on the angels. We need to be prepared for this and ready to accept it as well. Many think so.