Angels are fascinating creatures, as they enjoy the beatific vision of God but can also assist us in our needs on earth.
This is how God created them. He will often send them down to us as messengers of his divine plan.
Here is the collect prayer from the feast of St. Michael the Archangel in the former liturgical calendar.
O God, Who, in a wonderful order,
providest ministries both of angels and of men,
grant in Thy mercy that they who ever stand before Thy face to minister unto Thee in Heaven may protect us during our life upon earth.
And today we celebrate...